★ 5

Source: Google

★ 5

I visited this gym in February of this year while visiting from overseas for the military. I was able to get a week pass for pretty cheap and the owner was pretty nice about everything. He just explained some rules which were basic gym etiquette that I had no problem with. He gave me a key which allowed 24hr access and I was free to use the gym whenever. The equipment is very well taken care of and I had no problem doing my normal workout. This is the gym to go to if you want a clean professional gym that's not too crowded.

Source: Google

★ 5

This is a great gym! All the equipment you need and helpful members and coaches willing to direct you. This place is responsible for some of my favorite adult memories!

Source: Google

★ 5

just started coming here with my buddy recently and i don’t regret it. they have the best lifting equipment and machines i’ve seen out of any other gym i’ve been too in a 30 minutes drive.
The owner Ian is awesome, he’s super cool and chill.
the gym is super clean and the community is amazing.
you can come in at 6pm and see it for yourself.
you’ll see people cheering for a random dude hitting his PR.
It’s a really cool environment.

Source: Google

★ 5

Fitness Underground is as close to perfect as it gets. It’s open 24/7, always clean, and never overcrowded. The atmosphere is great. Everyone is friendly and follows proper gym etiquette. Their social media is a goldmine of useful fitness tips, and the music is always on point since members take turns curating the playlists. Easily one of the best gyms around.

Source: Google

★ 5

One of the best gyms I’ve been to great. 24/7 access, more than enough equipment and great people. Definitely recommend it

Source: Google

★ 5

This gyms great. They have great equipment, everyone is very friendly, and the gym is extremely clean.

Source: Google

★ 5

I was in the area for a work event and wanted access to powerlifting equipment for a few days. This gym has a lot of powerlifting and machine space, the bathrooms and changing areas are clean, and the community and vibes are among the best I've experienced at powerlifting gyms. Ian was a great help setting me up with the week pass and key fob, and made the whole process to getting all that super straightforward. Would definitely come back for meets or if I'm ever in the area for a few days again.

Source: Google

★ 5

Excellent gym, I got a week pass while traveling for work. Well maintained, great equipment, a powerlifter environment for sure. The staff and members were friendly and welcoming. I will not hesitate to come back.

Source: Google

★ 5

Source: Google

★ 5

Recently went to this gym and it exceeded all expectations. Had all the equipment you could think of and the staff were extremely friendly and knowledgeable. Would highly recommend to anyone looking to avoid the busy rush of public gyms!

Source: Google

★ 5

Source: Google

★ 5

I purchased a day pass here. I loved how the place wasn't over crowded, equipment was well maintained, music was on point, and the rules and expectations were clearly established. I will come back when I am in California again.

Source: Google

★ 5

Great gym with wonderful people. While this gym is very focused on the power lifting sport, anyone can benefit from it. The equipment is very high quality and the owner upgrades it regularly. You can access it at any time too with a key fob so there's never a concern with holidays or weekends.

Source: Google

★ 5

First off, I'm 32 years old. I consider myself pretty knowledgeable when it comes to dieting and working out. Yet, I've struggled for years to stay consistent with both. I've had a LA Fitness membership since 2009. So, I decided to search elsewhere than your typical large gym (e.g., LA Fitness, 24 Hour Fitness) in hopes of finding a solution. I searched for a local gym on Google, and Fitness Underground was the first to pop up. I'll admit, I was hesitant—I was so used to large gyms with every machine possible, even if I knew I would never use them, lol.

I found myself scheduling a consultation with Ian, the owner. He's been my personal trainer since January 2024; it's now July 2024. I'll begin by saying Ian has enriched my knowledge of both dieting and working out. He corrected bad lifting habits that I never knew I had, which led to less stress on my body, fewer pains, and fewer injuries. All the "random" shoulder and back pain is no longer random or a mystery to me, but most importantly, a thing of the past. My dieting has improved tremendously since Ian and I started working together. Ian understands that everyone has different eating habits. We took the time to figure out what works best for my lifestyle, and within 6 months, I went from 218 lbs to 188 lbs. My wedding photos look great thanks to Ian and the people at Fitness Underground.

Don't get me started on the environment—it's extremely welcoming. Everyone is so friendly and polite. It might come off as intimidating if you're not a powerlifter or someone who squats or deadlifts, but don't be. Everyone is a gentle giant—don't be scared. I can't express my gratitude enough! I highly recommend this place—give it a shot.

Before and after photos attached!

Source: Google

★ 5

I enrolled in this gym 3 months ago. My experience has been nothing short of amazing thanks to the help of my trainer Ryan I have accomplished things that I did not think I was capable of. The environment is extremely welcoming and friendly, all the equipment is very neat and well taken care of. I would also like to thank the owner Ian for letting be a part of such an amazing community.

Source: Google

★ 5

Had an amazing time! Went on a one-day pass with a friend and loved the environment; everybody was super kind and knowledgeable. Got great tips that helped a lot with my deadlift technique just from the couple hours I was there :)

Source: Google

★ 5

Loved the gym I’m 15 and this is the first powerlifting gym I’ve gone too and it didn’t disappoint not one bit it’s a great gym and the equipment and variety of barbells is also great will definitely come back again for some new pr’s.

Source: Google

★ 5

Source: Google

★ 5

Fitness Underground is an absolute gem in the world of powerlifting gyms. The owner, Ian, has created a haven for fitness enthusiasts by holding social events, access to healthy meals and going as far as asking members what equipment the gym may be lacking in order to fulfill everyone’s needs. The gym excels a welcoming atmosphere and has strong commitment to maintaining it clean, organized, and well-equipped. The members are friendly and supportive whether or not you are experienced lifter or just a beginner.

To add, Renato, my trainer has been great the last 3 months. As being a first time power lifter, Renato created a motivating and supportive atmosphere while guiding me each step of the way. The attention to detail in his coaching, coupled with his positive demeanor, made each session enjoyable but also challenging. My strength and form continues to improve week over week !

I have tried many gyms in the Sol Cal area … if you're serious about your powerlifting journey or just getting back in shape, this gym should be your go to.

Source: Google

★ 5

After coming off an ACL tear, I wanted to get into better shape after rehabbing my knee and I found Fitness Underground. At first, I was hesitant but the 24/7 availability and seasoned trainers convinced me to give it a try. Best decision ever! I began my training with Ryan immediately and quickly learned how out of shape I had become. Ryan not only put my training plan together but also taught me about my nutrition and how to better it. He also made it his priority to teach me about the different muscle groups and which muscles each workout was geared towards strengthening. I feel far more comfortable coming into the gym on my own and knowing how to workout and which muscles to work on. It’s been a couple months since we began and I’ve see drastic changes and more importantly feel much better physically and mentally. I would 100% recommend Fitness Underground and Ryan as a trainer.

Source: Google

★ 5

Awesome gym!!

I worked out with a personal trainer (Renato) at Fitness Underground three times a week for about six months and had a great experience.

I'd never seriously lifted weights in the past and was nervous going in, but Ian, the gym owner, was very welcoming and did a great job matching me with a trainer that I'd work well with.

I still consider myself to be a gym amateur (at least with respect to experience working out at other gyms), but Fitness Underground seems to have all the equipment you could need and then some. I felt like I was learning something new every session! Also it was easy to make new friends as everyone there, from the owner to the trainers to the other gym goers, was very friendly!

I would usually go Tuesday, Thursday, and Saturday in the late afternoon, and the gym was never overwhelmingly crowded. Sunday mornings were especially calm (my preference). It's also always very clean and Ian invests a good amount into it as there seems to always be new machines and equipment!

Finally, my man Renato deserves a shout out for his knowledge, guidance, support, and flexibility with my schedule throughout my training program at Fitness Underground! He immediately made me feel at ease upon our first session and pushed me on those days when I needed it. As for evidence of my progress, well, I have to keep buying new clothes thanks to muscle growth, so clearly Renato knows what he's doing!

Overall, I highly recommend Fitness Underground if you are looking for a clean, friendly neighborhood gym to workout. I'd still be there if I hadn't moved out of the area!

Source: Google

★ 5

Me and my fiancé have been going to this gym for a little over 7 months. First we started with Ian as our trainer but later on we had to switch to denisse. Both had and have been an amazing trainer not only did they teach me how to properly workout but also about nutrition and how important of a role it is in my fitness journey. Now I am currently 5 months pregnant and I am the healthiest I’ve been in a really long time. Denisse has made sure all my exercise are pregnancy friendly and really informative of everything I am doing. I really couldn’t have chosen a better gym not only because of the trainers but also because the people that work out there are also really friendly if asked they will help you and people won’t judge you.

Source: Google

★ 5

In June 2023 I was looking for a personal trainer to help me get in shape before I turn 40 next year. I'm so glad I found Underground Fitness! Ian promptly responded to my request for a tour and a consultation. He gave me a straghtforward, friendly tour of the gym and quickly set me with up with Ryan, my current personal trainer. The pricing was very reasonable and there were a great set of options to meet various needs. The gym is well kept, has everything you need, never feels over crowded, and Ian really cares to fix/update/maintain things to give everyone the best experience.

My trainer Ryan is excellent. I had never done weight training before and was overwhelmingly confused about what I should be doing to stay fit. Within the first day I was clear on what works and what doesn't. I started seeing results right away. I smashed right through my first goal weight, rapidly approaching my second and my strength is increasing quickly at the same time. On top of that, Ryan's great to chat with between sets. He's super positive, encouraging, knowledgeable and fun!

If you're in the area looking for a gym I absolutely recommend you take a look at Underground Fitness. If you need a personal trainer too, ask for Ryan!

Source: Google

★ 5

I have lived in the area since 2010 and this is by far my favorite gym to go to!! all the other chain gyms are way too crowded for my preference. I like to go workout at my own time without concern that it's overcrowded, having access 24/7 with my key fob is perfect for me and I feel safe going in anytime, no one bothers you, it truly feels like working out at the comfort of your home but with all the modern equipment needed. The owners are super kind and attentive to the client's needs as well, you def feel like part of a community where everyone is helpful vs judgy. Also this gym has the best views of the mountains which is an added bonus :)

I have also been a client of Marisa when she was doing personal training (one of the owners) I had signed up since the early days they opened up and by far she's been my favorite personal trainer I've ever had! for so many reasons, she got me quick results without pushing me so hard that I'd feel like dying (like other trainers do) I don't like it when they do that. I know my limits and she worked with me on that as well as a personalized nutrition plan. Recently I received personal training sessions from one of her trainers Veronica and she was awesome as well, trains the same way Marisa does and has her own techniques to help you get results quickly. If you're someone who wants access to a private gym with an awesome community and great experience overall this is the place to be

Source: Google

★ 5

Source: Google

★ 5

HOME

Source: Google

★ 5

Best gym in socal

Source: Google

★ 5

Excellent gym with the best, no nonsense equipment. The gym goers here are strong and inspiring.

Source: Google

★ 5

I have been a member of Fitness Underground since June 2022. I can without a doubt say that this is the best gym I have been a part of thus far. I have been in multiple commercial gyms over the years and built a small home gym during the pandemic. My fitness journey has been up and down but became consistent during the pandemic and I started to reach my goals. However, I injured myself and started to stagnate in my physique and strength goals. Despite buying multiple training programs I improved slightly at best and not at all in most areas. I needed personal training. I looked around the area and spoke with multiple gyms and trainers. In the end, I chose Fitness Underground. This place provided me with more than I needed. The owner, Ian, show me around the gym, told me about his experience within the field, and worked with me to come up with clear goals and how I can achieve them. He was kind, and informative, and answered all my questions and concerns, especially when it came to my previous injury. He was direct and upfront about the pricing and offered competitive prices when it came to personal training. He did not pressure me into coming to the gym in any way and allowed me to think about my choice. He also asked me questions in order to understand me and my experience instead of just trying to sell me personal training like the commercial gyms have done in the past. He didn't guilt trip me. It felt like an actual collaboration. Since joining I have made more progress than I ever have on my own. He created a training program specifically tailored to myself and my goals. He would make adjustments mid-workout based on my performance. My experience with Ian has been nothing but great so far. He helped me push myself and overcome the fear that my previous back injury gave me. He does more than just tell you the workout, he helps you understand why you are doing this specific exercise and makes sure you are doing it correctly and safely. He helped me improve my strength, physique, and on top of that, my confidence.

The community within this gym has been more than I ever expected. I am use to the regular commercial experience of people going in and out and nothing more. Fitness underground gave me a community that I did not realize I wanted. People were kind, supportive, and encouraging all around. They remembered who I was and can be seen supporting each other and hyping one another up. Everyone has been welcoming and became something that I looked forward to each time I showed up. I use to love it when the gym was empty, but now I show up when I know people will be there.

The gym itself is kept clean, and organized, and provides you with more than enough equipment. There are a multitude of platforms to deadlift, racks to squat/bench, barbells to use, and dumbbells of weights that I cannot lift just yet. Everyone helps keep everything organized and clean. There is more than enough space to work out and nothing feels as though it is crowded. Whether your goal is bodybuilding, powerlifting, or simply just trying to improve yourself. This gym offers more than enough to help you achieve your goals.

If you are looking for a gym that allows you to push yourself, has a welcoming, caring, and supportive community, equipment that allows you to test your limits and help reach your goals, or trainers that actually work with you then I can honestly recommend fitness underground.

Source: Google

★ 5

Great vibe, forward thinking owners, clean gym open 24 hours a day. Personal training has changed my life for the better!

If you want positive personal growth and results, go to the professionals.

I have lost 21" of fat, I'm the strongest and most confident that I've ever been, and I look amazing for 61 years young.

Thank you Marisa! You are the best trainer ever!!

Source: Google

★ 5

I have been personal training with Marisa for a while and I have to say it’s been the best experience ever! She motivates you, she supports you, she even provides you food menu for your journey to get successful results. She customizes your workouts based on your personal fitness level and goals. I have seen great results with her!!!!!
The gym is super clean and well kept!

Source: Google

★ 5

I found Fitness Underground through its Yelp reviews a few years ago. I was looking for an alternative to CrossFit and wanted to focus on gaining strength, so a powerlifting gym seemed like a good fit. I found this gym and have never looked back. The gym is always super clean and has a wide variety of equipment that can suit anyone's needs. I was worried about working out by myself because of intimidation, especially since I am in my mid-40s and was going to be around a lot of younger folks. But seriously, no one cares. Everyone is there to get better and help each other out. No egos. I've been doing personal training with Ian and continue to see my max lift numbers go up, which is exactly what I want. If you are looking for someplace new, grab a day pass and check this place out!

Source: Google

★ 5

This gym is awesome! Ian, the owner, is helpful, knowledgeable and willing to lend a hand if you have a question or need guidance. His personal training programs really help you to reach your goals, no matter where you are in your fitness journey. He has done an amazing job of building a supportive community within the gym as well. From the equipment to the people, this place is top notch. If you are looking for a true gym that is dedicated to helping you achieve your fitness goals and are tired of the big box gym environment, this is the place for you! 10/10 would recommend.

Source: Google

★ 5

I have been training at Fitness Underground for about a year and a half. I originally started training with Ian, the owner, to get in shape for my wedding. Ian is not the first trainer I have used but his approach to working out has truly changed my life. The first couple of months were hard, not only because I was not used to working out to that extent, but also because getting up and working out before work is difficult. Still, that hard work changed me, and I do not see myself not having a trainer like Ian ever again. Working out twice a week with Ian truly gave me the best results I have ever had. Now I have a 9-month year old baby and can only train with him once a week. I look forward to that training session every week and any chance I get, I try to squeeze another session in. I drive 30 minutes in the opposite direction to get there every week and I have no regrets. If you are looking for a gym that’s open 24/7, has legit equipment for deadlifts, squats, powerlifting in general, I promise you, Underground Fitness is where you need to be. It is of course clean, well maintained and has healthy food/snacks readily available but what is most important to me is the time, energy, and effort Ian puts into every session. I whole heartedly where the apparel and genuinely see Ian as a friend. Don’t believe me? Come on Thursday mornings so I can prove you wrong.

Source: Google

★ 5

The cleanest and friendliest gym I have ever been to.

Source: Google

★ 3

This gym has a nice variety of equipment. The members are friendly! During peak times it can get a little crowded.

Source: Google

★ 5

Source: Google

★ 5

Source: Google

★ 5

Very inviting place, the people that train there are very welcoming and it's not intimidating at all to train there no matter what your strength level is. They have power bars, a set of kilos, and even a belt squat; all you need to get stronger.

Source: Google

★ 5

Owners are great
Atmosphere is great
Seems intimidating but it's not
Everyone here is friendly, respectful, positive and supportive
Cant find a better gym than this

Source: Google

★ 3

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★ 5

Source: Google

★ 5

I went from Golds gym to this one and the difference is like night and day. Vastly better atmosphere here and the barbells are of much better quality.

Source: Google

★ 5

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★ 4

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★ 5

Source: Google

★ 5

I joined this gym in early December to start getting stronger and to lose some weight, Ian and Marisa are great! In just the month I've been training my squat has gone up 45lbs and my bench has gone up 35lbs great place if you're looking for a strength training or powerlifting gym. #Underground

Source: Google

★ 5

Not too long after New Years, I was on the traditional “I am going to get in shape this year” kick like everyone else who set new year resolutions. I had seen an ad on Instagram for Fitness Underground and thought, man this could truly be a different experience and it’s so close in proximity! At the time, I was working out a Chuze and didn’t necessarily have any complaints, but lacked the closed-knit atmosphere and lacked the free weights I grew up being used too as a football player. I had signed up, not necessarily seeing the gym itself, but didn’t necessarily have the motivation to get in there. It wasn’t until the owner Ian called me and let me know that he felt bad charging me for another month without me stepping foot in the gym. He ask when I could make it in so I could check out the place and get the feel of the place.

Shortly there after our conversation, I was able to meet Ian officially and also go over some of the basics for lifting and testing my strength. It was humbling to see that I wasn’t as strong as I thought, but also reminded me the reason I was here in the first place. Ian offered to build out a personal program for me and has continuously done so for the last 7 months. I can tell you from personal experience, the programming has helped me “check my ego at the door” as Ian would say as well as encouraged me to continually come back and try to dominate another week as it gradually edges you up in “PR’s” or personal records. I can say confidently, I am stronger than I have ever been in my life, I have more confidence than I’ve had in a long time and I truly love my gym. It’s a place where you can be yourself, are encouraged by everyone and where the owners Ian & Marisa believe in their athletes and want them to have the best atmosphere to compete, to better their lives and to have a place to belong. If you are looking for a change up in weight lifting or a place just to get back in shape, definitely give Fitness Underground a look. I personally have enjoyed my experience and transformation. Thanks for all the support F.U. I am forever grateful!

Source: Google

★ 5

Fitness underground is the best gym i have ever been to! I love going to bootcamp, open gym, and personal training with Marisa! They have all the best equipment with a large variety and the best trainers who always want to help!

Source: Google

★ 5

This gym is awesome! I enjoy coming to bootcamps in the morning at 6 am. Marisa is a great trainer, and really cares about you. If you have an injury and let her know. She will help you modify each exercise. Bootcamps are always fun and motivating. We all have such a great time. It really makes working out fun! I like that Marisa incorporates different exercises and she even does kickboxing Wednesday's.

Source: Google

★ 5

Nicest owners! Professional and modern place. You can tell the trainers are all there because they truly love it and thrive off of helping their clients. It’s a great experience, especially comparing to the bigger chain gyms that only care about the money and memberships. Fitness Underground is different and it is so refreshing!

Source: Google

★ 5

The long and short of it is, if you're serious about reaching your fitness goals, Fitness Underground is the way to go!!
I signed up for my first ever Spartan (this one happened to be a Super), which was on Jan. 27, 2018. Leading up to that date I had been searching for a gym and personal trainer who I can trust and be comfortable with since I had a few nagging sports injuries (right knee and left shoulder). Marisa took her time to ask me questions, assess me, and review my goals. She customized personal training sessions to maximize my strengths and strengthen my weaknesses. In this case my biggest weaknesses were grip strength, core, and lower back. Marisa's technical training made a huge impact and was the difference! So much so that I dominated 23 of the 27 obstacles.
Thank you Fitness Underground!
Next stop, Spartan Beast, Sprint, and my Trifecta.

Source: Google

★ 5

Source: Google

★ 5

Outstanding gym, the owners Ian and Marisa really care about each individual lifters success. They have fully committed to having heir own powerlifting team that will be competing later this year. The gym atmosphere is great, something that will definitely breed greatness of each individual lifter. Best gym this side of the Mississippi

Source: Google

★ 5

Great workout atmosphere. Ian and Marisa are very nice and helpful. This place is unique and great for everyone who wants to reach their fitness goals!

Source: Google

★ 5

I've been living in Upland for practically my whole life and have tried literally every gym but never felt at home. I actually found this place while going to pick up some food at the Meditteranean restaurant nearby and was very excited to get a membership after getting a tour by the owners, who are awesome by the way! I come in and do my thing and everyonce in a while I will do a drop in for group training but am not currently enrolled in the unlmited because I usually prefer training by myself. I highly recommend the open gym membership for anyone who likes to lift weights in a very cool environment! They have all the equipment I need to maintain a strong, functional mind and body. Check it out!

Source: Google