Gym in Thornton, CO
Adventure Fitness
Athletic Club
Adventure Fitness Athletic Club is a locally owned and operated gym located in Thornton, Colorado. At Adventure Fitness, we are more than your typical gym because we provide a wide array of equipment, specialty services, fitness classes, personal training, cryotherapy, and other offerings that you won’t find at other gyms in the Thornton, CO, area.
12301 Grant St. #210 Thornton, CO 80241 - (303) 920-2030 - Mon-Fri 4am-8pm | Sat 5am-2pm | Sun Closed
300+ 5-STAR REVIEWS • TRUSTED ACROSS THORNTON AND NORTHGLENN
Variety of Programs
Train your way with personal training, group classes, recovery options, climbing, and more.
Easy to Join
Get started quickly and become part of a supportive fitness community.
Fitness Assessments
Track your progress with tools like InBody 770 body composition testing.
Certified Trainers
Experienced, certified trainers are available to help customize your fitness journey.
GOLD MEMBERSHIP
One Membership. Full Access.
Our Gold Memberships include full access to our:
Included with Membership
Available Add-Ons
PREMIUM EQUIPMENT. REAL SUPPORT.
Why AFAC Stands Out
Unique Amenitites
Enjoy cryotherapy, hydro-massage, bariatric support, InBody 770 body composition testing, climbing walls, and an expansive climbing cave. We also have experienced, certified trainers in the gym at all times to help you customize a fitness program that's right for you.
Strength Training Equipment
Train with dumbbells, kettlebells, barbells, trap bars, powerlifting, full cages, squat racks, cable machines, stacked weight machines, Smith machines, landmines, leg press, hack squat, shoulder press, chest press, triceps and biceps machines, and an assisted pull-up and dip machine.
Cardio Equipment
Use treadmills, upright bikes, spin bikes, recumbent bikes, ellipticals, VersaClimbers, Helix machines, StairMaster, rowing machines, Jacob’s Ladder, and Airdyne bikes.
Specialty Equipment
Challenge yourself with TRX, battle ropes, a full jungle gym, resistance sleds, versa pulley, Power Plate, VIPRs, ab coasters, traverse machines, cargo nets, boxing and kickboxing equipment, resistance bands, Smovey, BOSU balls, slam balls, medicine balls, tires, sledgehammers, maces, and clubs.
Common Questions
Everything You Need To Know Before You Join
Here are some of the most frequently asked questions we receive at Adventure Fitness Athletic Club. If you have additional questions, please contact our team for assistance by calling 303.920.2030 or emailing mike@adventurefitness.club.
Is your gym near me?
Adventure Fitness Athletic Club is located at 12301 Grant St. #210 Thornton, CO 80241. We serve the north Denver region including Northglenn, Westminster, Thornton, Broomfield, Brighton, Arvada, and many of the other local areas. You can view a map of our location on our Contact page or by scrolling down to the bottom of this page.
Compared to other gyms near me, how is AFAC gym different?
AFAC gym stands out among other local gyms in many ways. Our staff is committed to helping every member achieve their fitness goals in a friendly, supportive environment where everyone is treated with respect, regardless of their ability. Our gym is spotless, all equipment is top-of-the-line, and everything is meticulously maintained. AFAC gym also offers unique fitness experiences that you won’t find at other gyms like cryotherapy, group fitness classes, a climbing cave, and a climbing wall. Please read this page to learn other ways that AFAC is different than other gyms near you.
When is your gym open?
Our gym hours are Monday through Friday, 4:00 am-8:00 pm, and Saturday, 5:00 am-2:00 pm. We are closed on Sundays.
Does your gym have personal trainers?
Yes, AFAC gym has a team of experienced, certified personal trainers who are available to assist you. Click here for more information. You can also visit or contact us to learn more.
Does your gym have fitness classes?
Yes, AFAC gym has a full schedule of fitness classes that are free to our members including Yoga, Kickboxing, Power Plate, Boot Camp, Rise and Shine, Flow Motion Mobility and Flexibility, Deka/HIIT and many more. To see a schedule of our classes and sign up, go to our Class Schedule page. Non-members can join our classes for a $25 per-class fee.
How do I join your gym?
To learn more about how to join our gym, see our Membership page and Contact Us for more information.
Does your gym have showers, lockers, and a kitchen area?
Yes, AFAC gym has showers, lockers, and a kitchen area for our members to use.
How old do I have to be to join your gym?
People aged 14 and older can join AFAC gym.
Can I bring a guest to your gym?
Yes, members can bring a guest to the gym. Please contact our staff for more information.
TRAIN WITH ENERGY
Free Fitness Classes For Our Members
AFAC gym has a full schedule of fitness classes that are free to our members including Yoga, Dance Party Fitness, Rhythm Cycling, Kickboxing, Power Plate, Boot Camp, Tabata, Rise and Shine, Mobility and Flexibility, Deka/HIIT and many more. Classes are designed to accommodate all ages and fitness levels.
Strength & Conditioning
Build strength, improve endurance, and challenge yourself with structured training designed for real progress.
Yoga & Mobility
Improve flexibility, body awareness, balance, and recovery with classes designed for all fitness levels.
Kickboxing & HIIT
High-energy classes that keep your heart rate up, push your limits, and help you stay motivated.
Cycling & Total Body
From Rhythm Cycling to Total Body Conditioning, our schedule offers fun, challenging options to keep workouts fresh.
Classes are available for non-members for a fee
Our Thornton Gym’s Mission
Our mission at Adventure Fitness Athletic Club is to be a gym that helps members, the community (near and far), and staff achieve a healthy and happy lifestyle both physically and mentally in a unique, safe, fun, comfortable, welcoming, and encouraging environment.
Our Gym’s Core Values
Keep AFAC a friendly, clean, and safe place.
Treat each other with respect, and as an important part of the AFAC family.
Support people both near and far.
Remember that each person is an individual and what works for one person may not work for someone else.
PERSONALIZED SUPPORT
Customized Fitness Programs at Our Thornton Gym
At Adventure Fitness, we offer a wide variety of customized fitness programs. Our personal trainers are always in the gym and can help you customize your personal fitness adventure.
RECOVERY + PERFORMANCE
Cryotherapy in Thornton
Our gym is excited to offer individual whole-body cryotherapy sessions to our members. During cryotherapy, your body will be enclosed in a chamber from the neck down. The cryotherapy session, which lasts about 3 minutes, will begin with liquid nitrogen being pumped into the chamber.
Many people, including professional athletes, credit regular cryotherapy sessions with helping them recover more quickly after physical exertion.
Benefits:
• Relieving muscle and joint pain
• Healing muscle tissue and cell damage
• Losing weight
• Reducing inflammation
• Younger-looking skin
• Improving mood
• Boosting energy
Make your appointment today!
303.920.2030
See What People Are Saying About Our Gym
OUR THOUGHTS
Fitness Tips, Gym Updates, and Local Insight
Explore the latest from Adventure Fitness Athletic Club, including gym updates, membership info, and helpful fitness content for Thornton and the surrounding area.
AFAC Gym Is the Highest-Rated Gym in Thornton, CO — See Our 300+ Five-Star Reviews Here!
What Is Cryotherapy and Where Can I Find Cryotherapy Near Me in Thornton, CO?
AFAC Gym Wins BusinessRate’s Best of 2025 and 2026 Thornton Gym Award
300+
5-Star Reviews
2024 & 2025
Best of the Best
20+
Years of Experience
All Levels
Welcome at AFAC
Visit Us
Find AFAC in Thornton
Ready To Get Started?
Want to Schedule an Appointment?
Call 303.920.2030 for further information about memberships. You can also fill out the form and we will contact you.
