Best Gym near Denver, Colorado

I’ve been to a lot of gyms, but this one truly stands out. From the moment you walk in, the atmosphere is welcoming and motivating. The equipment is a blend of old school and top-notch—everything is well-maintained. Whether you're into weightlifting, cardio, or group classes, they have everything you need. I’m especially a fan of their wide range of free weights and the specialized machines for different muscle groups. Plus - the cleanliness of the facility is impressive! Everything is spotless, from the locker rooms to the floors. I highly recommend this gym to anyone looking for a supportive, well-equipped, and positive environment to hit their fitness goals. It’s definitely worth every penny 💪🏼

Had an incredible experience at this gym! The team was very accommodating for me and my group to use the gym for our workouts during our retreat. Had a great time, our whole group was raving about the equipment and atmosphere, would definitely come back if in town!

Rocky Mountain Flex was my home gym for the last year! I spent upwards of 20-25 hours a week prepping for my first physique competition here! As a fitness professional and a bodybuilding competitor this gym had everything I needed to THRIVE 🙌🏼 the posing room, the equipment, the natural lighting, the turf, the friendly faces 🤗 I've recently moved away from Denver and I miss RMF badly, every day! And there really aren't many comparable options in the Denver metro area!

The facility is very clean, comfortable and the staff is so nice. I especially am impressed by the Personal Trainer, Reid Wilson. He is so intuitive. Listens to my body and makes modifications based on my past and present injuries. I am stronger, more flexible, and have a much better diet because of his knowledge. I would highly recommend him and Rocky Mountain Flex Fitness!

Best gym in Denver! It has a great selection of strength training equipment that's hard to come by in the area. I highly recommend the gym.

I’ve been working out for 15 years, and without a doubt, this is the best gym I’ve ever been a part of! The variety of equipment is unmatched, with something for every type of workout—from strength training to cardio and everything in between. Whether you're into free weights, machines, or functional training, they've got it all! The staff is incredible too—always friendly, welcoming, and ready to help with any questions. It’s clear they genuinely care about creating a positive and supportive environment.

Stacey is the best instructor at this location. She gives the clearest instructions and her classes are consistent and professional. She also presents information and her expert knowledge about the body clearly and incorporates it all seamlessly into the class. She is very aware of safety and always adds instructions and insights to prevent injury and to help her students strengthen their whole bodies. She is an excellent teacher all the way around.

A Stellar Trainer, but Room for Improvement at the Gym I’ve been working with Rick Allman as my personal trainer for over two months, and he has been nothing short of exceptional. Not only is Rick incredibly knowledgeable about fitness and nutrition, but he’s also an outstanding motivator. On two occasions, I considered backing out of my commitment, and both times, Rick gave me the encouragement I needed to stay on track. Without his guidance, I’d likely still be sitting on the couch, watching life pass me by. Instead, I’m on a path to both physical and mental success. As long as Rick is training, I’ll follow him wherever he goes. He’s truly that good. However, I do have some concerns regarding the gym’s management and policies. When I signed up, I was told that personal training clients had access to “the cage” anytime without having to wait or compete for equipment. Yet, every time I’ve tried to use it without a trainer present, a staff member has approached me and asked me to leave. This has happened at least seven times, all with different staff members, which makes me question whether they’re unaware of the rules or if I was misled during the sign-up process. Additionally, I was disappointed to learn that the gym has banned my trainer from using certain equipment he brought in to enhance training sessions. These tools were designed to improve range of motion, reduce injury risk, and speed up recovery—all essential aspects of a well-rounded training program. Considering the cost of these tools is minimal (less than $100), it’s surprising the gym doesn’t provide them for trainers and clients. While Rick Allman’s expertise and dedication are the highlights of my experience, the inconsistent communication, unhelpful staff interactions, and questionable management decisions detract from the overall experience. The high turnover rate among staff also suggests issues with leadership. I hope the gym can address these concerns and align its policies to better support both its trainers and clients.

Not sure what DOES work here. It definitely isn’t the machines, TVs, and definitely not the staff. Regularly out of sanitizing wipes, staff are always chatting and doing nothing besides trying to sell you a personal trainer. The gym for you if you like spending money without seeing the value.

Way too crowded and the locker room/sauna is absolutely filthy. Lifting area is clean and equipment is good. However, there is wait for every machine unless you come when everyone is at work. Good prices though.

Big Coach, Coach Meg and all of the ladies at Super Shock Thank you so much for all you do. It's more than cheers and flips they teach life lessons.

Andrea, Jay, and all the coaches and assistants are amazing! They really build a personal relationship with all of their clients and the results of their training speak for themsleves

I am a athlete at supershockallstars they showed me soo much and shows me life lessons I love it sooo muchh definitely a amazing experience

I used to cheer here when I was five miss them but I had to leave sucks

I have had a wonderful experience with the staff every time I go to the gym! They have a great selection of products and merch (including the BEST protein powder). It’s always clean and the other gym goers are great too! The owners and staff play a large role in the gym and it’s great to feel the sense of family and community there! I always feel welcome and comfortable working out. I love this gym!

A great place to call home where the staff makes everyone feel welcome, and the members are always considerate to each other. A terrific gym with great members! Everyone is polite and knows proper gym etiquette, being mindful as to not hog a machine or area. In an area where there are a lot of competitor gyms that can get packed during prime gym hours, X Gym stands out as a huge relief.

Super super Beautiful setup, gym is on point in every aspect, dope ascetic, vary vary clean Aspen was so so nice and polite, I will be Fs be coming back this is a must go to gym great for content creators and this is a gym for serious Lifters, Thanks again Aspen and see you see X 😉 P.S they have a Top Dog board check it out in my last photo 🏋🏽

I have been at this gym since 2014. I supported the gym through covid. My biggest complaint is the owners are not here. The place is falling apart. The Men's bathroom don't work most of the time. The equipment is broken. The main door is not locked at night. Nothing is updated or new. But I still get charged for new equipment. And the owners will not return calls.

Aspen was amazing and is always walking around making sure the gym is neat. The gym is never overly busy and it has such a positive atmosphere. Their workout equipment is also top tier. They’re the best!

Niks performance is an amazing gym. All the equipment you need. Amazing community, and Nikki is an amazing coach. She’s helped me lose 100lbs, gain 100lbs on the big lifts and 60lbs on my overhead press, while working around my schedule and occasional injuries

Nik is almost always at the gym, and if she's not, there are plenty of regulars there to help. Don't be intimidated to come and try it out!! It's a small gym, that offers a family vibe. There's also personal training for people of all ages and levels of fitness. If you're looking for a non intimidating gym where you can build lasting relationships and get great advice, this is the place to be!

Nikki is your go to for strength training needs. You won't meet anyone better in the area! She is a motivated and very driving person to reach your goals. Great personality and very down to earth. She dedicates all of her time to the gym!

This is a great gym & Nik is an AMAZING trainer! I highly recommend Niks Performance if you are looking a training environment/trainer that really caters to individual needs. Be it overall wellness, strength, or pro-performance; this is the place to go!

The facility is top notch for all interested in strength training but what really makes it stellar is the owner, Nikki Rouillard. Nikki is a fantastic trainer. She is the type of trainer who believes in you and cares about helping you get and keep a stronger physique. She knows what you are capable of before you even realize it. And she makes sure you are doing the exercises right; not just going through the motions. Plus, she will tailor your plan to your goals and changing needs (such as prep for spine surgery). As a bonus, she is kind and super positive. Highly recommended.

Fantastic energy!! Im one of the instructors so i always promise good nutrition, health tips and excellent workouts!! Been teaching here for 10 years and through all that time I've gained lifelong friends and it has changed my life!!

Very friendly and love the shakes and protein donuts ❤😋

Delicious and healthy drinks👌👍 Excellent attention.