🏋️ Official Rankings
10 Best Gyms in Boulder, CO (August 2026)
We compared 10 gyms serving Boulder and Boulder County, Colorado, and ranked the top providers by verified reviews, ratings, and local reputation — 1,485 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Transform Colorado - BLDR. Updated for August 2026.
- Gyms ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 1,485
- Area codes
- 303, 720
Transform Colorado - BLDR
⭐ 5.0 · 479 reviews
3000 Pearl Pkwy #1100, Boulder, CO 80301
CrossFit Sanitas
⭐ 4.9 · 185 reviews
By Sprouts &, 2525 Arapahoe Avenue, McGuckin Way, Boulder, CO 80302
KONDITION--Barre | Spin | Strength | Yoga | Dance
⭐ 4.9 · 101 reviews
3161 Walnut St, Boulder, CO 80301
Core Progression Elite Personal Training
⭐ 4.9 · 92 reviews
2525 Arapahoe Ave Bldg H7, Boulder, CO 80302
Mountains' Edge Fitness
⭐ 4.8 · 86 reviews
2907 55th St Ste 5, Boulder, CO 80301
F45 Training Central Boulder
⭐ 4.8 · 86 reviews
1750 29th St Ste 2020, Boulder, CO 80301
Body Balance Strength & Wellness
⭐ 4.9 · 38 reviews
4735 Walnut St Ste E, Boulder, CO 80301
Gyms listed here serve Boulder, Boulder County, and nearby ZIP codes including 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308, 80309, 80310, 80314, 80321 and more.