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Mountain Strong Thornton Gym
4.9 ★★★★★ 98 Google reviews · Climbing gym in Thornton, Colorado
Gym offering activity-focused fitness classes for CrossFitters, climbers, skiers & more.
Plan your visit
- Gear rental nearly every climbing gym rents shoes (~$5–8 typical) and chalk; harness rental is often bundled with a ropes pass
- Waiver always required at climbing gyms — sign it online before you go to skip the front-desk line
- First timer? bouldering needs zero experience — rent shoes and walk in; staff will point you at the easiest problems
- Today see hours ·
- Phone (720) 460-1778
- Website mountainstrongdenver.com
Hours
| Monday | 6 AM–8:15 PM |
| Tuesday | 6 AM–8:15 PM |
| Wednesday | 6 AM–8:15 PM |
| Thursday | 6 AM–8:15 PM |
| Friday | 6 AM–8:15 PM |
| Saturday | 10 AM–1 PM |
| Sunday | Closed |
What climbers say again and again
“I have been going to Mountain Strong since December and have enjoyed the challenge of the classes and the feeling of community that the gym offers.”
From the reviews
Best gym I’ve ever joined. The coaches and community make the difference. From a coaching perspective, technique and safety come before performance. The coaches care more that you don’t get hurt than any other nonsense. The community, while friendly, pushes you to do your best.
The community that Mountain Strong has been able to cultivate is wonderful. With many conditioning gyms, it sometimes can feel intimidating but not here. The coaches and owners make you feel part of their family. The members are open, friendly, and the best part, encouraging.
Prior to joining Mountain Strong, I had been going to a traditional gym for fitness and a typical climbing gym for climbing. Both gyms were passable. However, my fitness levels and climbing grades had plateaued. Then, I found Mountain Strong.
I have been going to Mountain Strong since December and have enjoyed the challenge of the classes and the feeling of community that the gym offers. I really appreciate the knowledge and professionalism of the staff, and although I am newer to lifting, they have been patient and provided excellent feedback.
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