Boulder Hot Springs Inn, Spa & Retreat Center
- From $12
- 96–106°F
- 1 hr 49 min from Bozeman
- Walk-in OK
A historic inn and retreat center 3 miles from Boulder in the Elkhorn Mountain foothills, run as an alcohol-, drug- and smoke-free property. Day passes cover an outdoor pool kept at about 96-100F and indoor plunges and steam rooms, with separate women-only and co-ed sides. The indoor hot plunges are continuous-flow without harsh chemicals, while the outdoor pool uses bromine.
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✓ Verified November 2026
- Price
- From $12
- Water
- 96–106°F
- Nearest town
- Boulder
- From Bozeman
- 1 hr 49 min
- Reservations
- Walk-in OK
Plan your visit
Hours & season
| Hours | Day use daily 10am-8pm |
|---|---|
| Season | Open year-round |
Tickets & booking
| Price |
|
|---|---|
| Access | Day pass, walk-ins welcome |
| Booking |
|
Rules
| Ages |
|
|---|---|
| Dogs | No |
On site
| Pools | 4 |
|---|---|
| Lodging | Yes |
Not stated by the venue: swimwear, camping nearby.
Water temperature
Soaking-pool temperatures as published by the venue or land agency; they vary with season and flow.
The pools
| Pool | Temp | Setting |
|---|---|---|
| Outdoor PoolGraduated depth; bromine-treated. | 96–100°F | Outdoor |
| Women's hot plungeWomen-only side. | 103–106°F | Indoor |
| Women's cool plungecoldUsually under 70F. | 70°F | Indoor |
| Co-ed hot plunge | 103–106°F | Indoor |
As published by the venue. Temperatures shift with the seasons and the weather.
Facilities
- Outdoor pool uses bromine instead of chlorine
- Indoor plunges are continuous flow, changing water every 4 hours, cleaned nearly nightly, no harsh chemicals
- Changing rooms: yes
- Showers: yes
- Drinks / bar: no
- Massage: yes
- Restrooms: yes
- Sauna: yes
| Accessibility |
|
|---|---|
| Bring your own alcohol | Not allowed |
| Smoking | Not allowed |
| Good to know |
|
What's here
- historic inn on almost 300 acres (National Register)
- outdoor mineral pool
- separate women-only and co-ed indoor plunges
- geothermal steam rooms
- massage
- alcohol-, drug- and smoke-free
Getting there
- From Bozeman1 hr 49 min82 mi
- From Helena41 min33 mi
- From Helena (HLN)40 min34 mi
Typical driving time without traffic or snow.
| Elevation | 4,863 ft |
|---|---|
| Road |
|
Things to do near Boulder
Elkhorn State Park
Ghost town with two historic buildings in the Elkhorn Mountains, southeast of Boulder.
Trailheads
- Red Rock Trailhead14.9 mi
Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.
Nearby springs
Pipestone Village & Hotsprings
Glamping cabins and domes near Whitehall, each with a private outdoor hot springs tub, on the site of the historic Pipestone Hot Springs. Soaking is for overnight guests only. Off-road and hiking trails surround the property, and Lewis & Clark Caverns and Butte are within a short drive.
Broadwater Hot Springs & Fitness
Helena's hot springs pool and fitness center on US 12 west of town, on a site used since 1889. A single-use pass covers five hot pools, two cool contrast pools, a sauna, a steam room and the gym, with The Springs Taproom & Grill serving poolside. The pools are lightly chlorinated as the city requires and drained and cleaned weekly.
Fairmont Hot Springs Resort
A large resort between Butte and Anaconda with 152 rooms, golf, a spa and hot springs pools fed by a 600-ft well. Pools are open only to overnight resort and condo guests and members, not day visitors. Phase 1 of a pool renovation added an adults-only tiered soaking pool, a family soaking pool, a lap pool and a cold plunge; phase 2 is under construction.
Pipestone Village & Hotsprings: 22 mi · Broadwater Hot Springs & Fitness: 27 mi · Fairmont Hot Springs Resort: 36 mi
Sources (4)
· checked November 2026
Prices, hours and rules are checked against the official site and land-agency pages. Spot something out of date? Let us know.