A downtown Boulder gym where everybody knows your name.
A full gym, nine certified trainers, and a recovery suite — cold plunge, cedar sauna, eucalyptus steam — under one roof at 1800 Broadway, a short walk from Pearl Street. Woman-owned since 2005.
Open doors, music in the hallway, a wall of faces at the top of the stairs, and a towel offered before you ask.
Train, recover, heal, fuel — one roof, one membership.
There’s no one plan that fits everybody, so nobody hands you one. What you get is a trainer who adapts to you, a recovery suite steps from the floor, and a physical therapist and a dietitian who work in the same downtown building.
Train
Nine certified trainers, an open floor of free weights and cardio, and a plan built around how you actually move.
Cold plunge, cedar sauna, eucalyptus steam — all included.
Recovery is part of the workout here, not a second membership across town. The Cool Tub seats eight, the cedar sauna runs hot, the steam room smells of eucalyptus — and it’s the room our late-70s members and our skiers end up in together.
Cold Plunge
The Cool Tub seats eight. Contrast, focus, and faster recovery for Boulder's runners, cyclists, climbers and skiers.
HOLD 50°F · 2–4 MIN
Cedar Sauna
A full cedar sauna — dry heat to loosen up post-lift and wind down after a long day on the trails.
150–175°F · FULL CEDAR
Eucalyptus Steam
Eucalyptus steam for breathing easy and a full reset — and yes, it’s included.
EUCALYPTUS · INCLUDED
4.6★153 Google reviews
2005Woman-owned since
9Certified trainers
$0Enrollment fee
2 hrValidated parking
The sweet club
4.6 stars, 153 reviews, one word that keeps coming up.
The word is name. After that: never crowded, and no gym smell.
★★★★★
"The sauna and cold plunge after a lift are unreal. It's the only gym where recovery is just… part of it."
— Google review
★★★★★
"Never crowded, always clean, and the staff know my name. It feels like a neighborhood spot, not a chain."
— Google review
★★★★★
"Trainers, a physical therapist, and a dietitian all in one place downtown. I stopped driving across town."
— Google review
Real people, not stock models
The people are the decor.
A wall of member photographs greets you at the entrance — the first thing guests point at. Here’s the rest of it: the trainers, the resident physical therapist, the dietitian, and a three-legged dog named Bucky. Woman-owned, run by owners who are on the floor most days, no uniforms, nobody putting a face on.
All for one, one for all — that’s what the ONE stands for.
Full gym floor — free weights, cardio & functional area
Recovery suite — sauna, steam room & cold plunge
Towel service & locker rooms
2-hour validated parking + 2 guest passes / month
A free consult with a trainer, PT, or dietitian
Find us
Downstairs at 1800 Broadway, a short walk from Pearl.
Nobody wanders into downtown Boulder by accident — if you’re coming downtown, you’re coming with a purpose. We’re in ONE Boulder Plaza, walkable from Pearl Street, with two hours of validated parking on site.
ONE Boulder Fitness 1800 Broadway #190, Boulder, CO 80302 ONE Boulder Plaza — downstairs
Yes — a cold plunge (the Cool Tub, which seats eight), plus a full cedar sauna and a eucalyptus steam room, all included with membership at our downtown Boulder club on Broadway.
Do you have a hot tub?
No — and we’d rather say so plainly. The recovery suite is a cold plunge, a full cedar sauna, and a eucalyptus steam room, all included.
Where are you, and is there parking?
We're at 1800 Broadway #190 in downtown Boulder, steps from Pearl Street, with 2-hour validated parking on site.
How much is membership?
Standard membership is $90/mo with $0 enrollment, month-to-month. Student and teacher memberships are $80/mo.
Do you have trainers, a PT, and a dietitian on-site?
Yes — nine certified personal trainers, a resident Doctor of Physical Therapy, and a resident Registered Dietitian, all at one address.
Can I try it before I join?
Please do. Take a free day pass, use the floor and the recovery suite, and see how the room feels. You can also book a free consult with a trainer, the physical therapist or the dietitian.
Will someone try to sell me something?
No. We’ll show you around, answer what you ask, and let you decide — that’s how we operate whether you join or not.
Do I have to be chatty to fit in here?
Not at all. Plenty of members come in, do their thing and go, and that’s completely fine. Being known doesn’t mean being on.
No pressure, ever
Be one of us.
The best way to know a gym is to stand in it. Come in, meet the team, use the floor and the recovery suite — and decide for yourself. No pressure, no pitch.
