Trinity Hot Springs
- From $15
- 90–108°F
- 2 hr 21 min from Boise
A members-club hot springs resort near Featherville on the South Fork Boise River, formerly known as Paradise Hot Springs. One fenced geothermal pool runs about 95-108°F in summer and 90-95°F in winter, booked in 2-hour slots. At least one person per party needs a $35 annual membership; lodging guests get pool access.
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✓ Verified November 2026
- Price
- From $15
- Water
- 90–108°F
- Nearest town
- Featherville
- From Boise
- 2 hr 21 min
- Reservations
- Check venue
Plan your visit
Hours & season
| Hours |
|
|---|---|
| Season |
|
Tickets & booking
| Price |
|
|---|---|
| Access | Members only |
| Booking |
|
| Time limit | 2 hours per visit |
Rules
| Ages |
|
|---|---|
| Dogs | No |
On site
| Pools | 1 |
|---|---|
| Lodging | Yes |
Not stated by the venue: swimwear.
Water temperature
Soaking-pool temperatures as published by the venue or land agency; they vary with season and flow.
Mineral profile
Total dissolved minerals
203 mg/L
Lightly mineralized · Sodium–sulfate (sodium sulfate water)
- pH
- 9.35
- Temp at source
- 136°F
- Fluoride
- 3.5 mg/L
Lab analysis of the source water at “03n 10e 33bda1s Paradise Spring”, sampled 1955–1972 by the USGS and partners (data). Pool water may be cooled, mixed or treated, and spring chemistry is generally stable over decades. We report measurements only; we don't make health claims.
The pools
| Pool | Temp |
|---|---|
| Hot spring poolFenced pool; about 95-108°F summer, 90-95°F winter | 90–108°F |
As published by the venue. Temperatures shift with the seasons and the weather.
Facilities
- Changing rooms: yes
- Showers: yes
- Massage: yes
- Restrooms: yes
| Good to know |
|
|---|
What's here
- fenced geothermal soaking pool
- lodge rooms, cabin rooms and Guenther's Chalet
- camping and RV spaces
- yoga and wellness classes
- spa services
- retreat center
- formerly Paradise Hot Springs
Getting there
- From Boise2 hr 21 min100 mi
- From Friedman Memorial / Sun Valley (SUN)2 hr 15 min88 mi
Typical driving time without traffic or snow.
| Elevation | 4,379 ft |
|---|---|
| Road | 1020 N Warm Springs Dr, on the Pine-Featherville road about 100 miles from Boise |
| Cell service | Limited / spotty |
Things to do near Featherville
Baumgartner Hot Springs and Campground
Forest Service campground with a hot spring pool east of Featherville
Trailheads
- Pine Gulch Trailhead3.3 mi
- Camp Creek Trailhead6.7 mi
- Bear Hole Trailhead8.2 mi
- Rainbow Basin Trailhead9 mi
Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.
Nearby springs
Baumgartner Hot Springs
A concrete soaking pool fed by hot spring water inside Baumgartner Campground, on the South Fork Boise River east of Featherville in the Sawtooth National Forest. The Forest Service gives the water as 98-111°F, and the pool is drained nightly. Swimsuits are required, and soap, alcohol, glass and pets are not allowed at the pool.
Atlanta Hot Springs
A natural hot spring near the historic mining town of Atlanta at the head of the Middle Fork Boise River, about 60 miles of mostly dirt Forest Service road from Idaho City. The Forest Service names it, with Powerplant and Chattanooga, among the natural hot springs near its Atlanta Guard Station rental cabin. NOAA lists the source at about 140F.
Chattanooga Hot Springs
A natural hot spring near Atlanta, the old mining town at the head of the Middle Fork Boise River, reached by about 60 miles of mostly dirt Forest Service roads from Idaho City. The Forest Service lists it among the natural hot springs near its Atlanta Guard Station rental cabin. No agency source gives its temperature or layout.
Baumgartner Hot Springs: 11 mi · Atlanta Hot Springs: 19 mi · Chattanooga Hot Springs: 20 mi
Sources (7)
· 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.