Trinity Hot Springs
By the HotSpringsFind editorial team · How we compile records · Reviewed September 2026
Trinity Hot Springs is a private hot spring listed near Featherville, Idaho. Reported soak temperature: 108°F. See the visit fact sheet.
Current status
Open year-round as a private membership club near Featherville: at least one person per party needs a $35/yr Trinity Club membership, then 2-hour soak slots are $15/adult ($10 youth, $5 child) by advance reservation; walk-ins without membership are not admitted.
Checked July 2026 · verified on the operator’s site · 7 sources ↓
Before you go
- Status: Reservation or permission required — confirm via Trinity Hot Springs FAQ page.
- Cost: Reported $15 — confirm current rates before visiting.
- Getting there: No verified hike distance on record — confirm the route and road conditions.
- Water: Reported soak temperature 108°F — always test the water before entering.
- Rules: Reported clothing required; reported dog-friendly.
- Conditions: check weather, fire closures, and land-manager alerts the week you go — mountain access changes seasonally.
- Reservations/permits: Trinity Club annual membership $35/adult purchased via website; guests pay $15/adult, $10/youth 5-17, $5/child under 5 per 2-hr soak; Paradise Club monthly plan ($55/adult/mo) includes unlimited soaking
- Booking: Reservation required.
- Best time to go: weekdays - local TV reported only a couple of visitors on a Wednesday; weekends much busier
- Clothing reality: No clothing policy published on current operator site; family-oriented private club - swimsuits presumed required. Site was historically clothing-optional under previous ownership (pre-2014); current policy unverified.
- Kids: Allowed.
- Cell service: spotty — download maps and tell someone your plan.
- Accessibility: large gravel-bottomed outdoor pool; no published accessibility details
- Membership REQUIRED - $35/adult/yr for at least one person per party, plus per-person soak fee
- Soaking = 2-hour reserved slots; reservation required, no walk-ins
- Everyone onsite must sign liability waiver
- Occasional closures for maintenance, pool cleaning, private events - check before driving
- Pool temp varies 90-95F winter / 95-108F summer
- Quiet hours 10pm-10am
- No RV hookups yet (power coming)
- Hazard: Remote mountain road (Middle Fork Boise River Rd from Pine) - snow/ice in winter; check conditions
- Hazard: Source certified 'Naturliches Heilwasser' - untreated water
- Hazard: Isolated location ~2 hrs from Boise
About this spring
Private club and retreat (former Paradise Hot Springs) on Grouse Creek near the South Fork Boise River — a large gravel-bottom outdoor pool at 90-108°F fed by spring water certified as 'Naturliches Heilwasser'; lodging, cabins and retreats. MEMBERSHIP REQUIRED even for day use. Fee: 2-hr soak $15 adult — REQUIRES annual Trinity Club membership. Membership required; may close for private events.
Trinity Hot Springs occupies the old Paradise Hot Springs property — earlier known as Paradise Lodge and Price's Plunge — in a mountain valley called Paradise along Grouse Creek near Featherville. The Rock family bought the resort in 2014 and is redeveloping it as a membership-based wellness retreat under Dana Stream. Its calling card is the water itself: Trinity Springs water is certified 'Naturliches Heilwasser' (natural health water) by Germany's Institut Fresenius, which the owners describe as the only such certification in North America. The club claims the water rises through a crystal-lined granite batholith from 2.2 miles down, emerging near 135°F, rich in silica and fluoride, and pure enough to drink. It feeds a large, unchlorinated outdoor gravel-bottom pool running roughly 95–108°F in summer and 90–95°F in winter. Lodge rooms, cabins and dry camping support retreats; at least one Trinity Club member is required per group, and the club can close entirely for private functions.
Directions & trailhead access
Featherville area, Trinity Mountain — office tours Mon/Wed/Fri-Sat; call 208-653-2123.
Idaho geothermal context
Idaho's thermal water rides the old track of the Yellowstone hotspot across the Snake River Plain and surfaces along faults in the surrounding mountains. Many of the best soaks are roadside or river-access pools inside national forests — including springs that only emerge when river levels drop. Backcountry sites demand real navigation skills and long dirt-road drives.
What a private-access site means here
This spring is on private property. Listing it documents the location's existence — it is not an invitation. Visiting requires explicit owner permission, and some sites are accessible only through memberships, hosted events, or arrangements with the land manager. Do not arrive unannounced.
Best time to visit
Year-Round (Best: May – October)Pool temperatures and access can change with weather and season. Outdoor ambient temperatures fluctuate significantly across Idaho. Late spring through autumn offers the most comfortable road access.
Fact sheet
| Reported soak temp | 108°F |
|---|---|
| Source temp (historical) | 108°F |
| Trail access | Recorded coordinates — access unverified |
| Access fee | Reported $15 — verify |
| Clothing policy | Reported clothing required |
| Pet policy | Reported dog-friendly |
| Geothermal data reference | NOAA Thermal Springs List (1980 archive) |
| Check land status | Private land — contact the owner/manager for permission |
Trinity Hot Springs FAQ
Is Trinity Hot Springs open right now?
Open year-round as a private membership club near Featherville: at least one person per party needs a $35/yr Trinity Club membership, then 2-hour soak slots are $15/adult ($10 youth, $5 child) by advance reservation; walk-ins without membership are not admitted. (Status verified on the operator’s site, last checked July 2026.)
Is Trinity Hot Springs free?
Trinity Hot Springs is listed with reported fees near Featherville. Fees are reported; confirm admission, parking and permit costs with the site manager.
What temperature is Trinity Hot Springs?
Trinity Hot Springs has a reported soak temperature of 108°F and a historical source temperature of 108°F in survey records. Historical data may not reflect current conditions — always test water before entering.
Is Trinity Hot Springs clothing optional?
Trinity Hot Springs is listed as swimsuit-required in directory records. Confirm current rules before visiting, as policies change.
How do you access Trinity Hot Springs?
Trinity Hot Springs requires permission, a permit or advance booking — confirm the terms with the site manager before visiting.
Where to stay in Featherville
Featherville offers area cabins for an off-site stay near Trinity. Check the operator’s current soaking, membership and overnight terms before choosing a rental; seasonal mountain access is separate.
Check the road and access notes above before you book.
We may earn a commission from bookings through these links, at no extra cost to you.
Sources & references
- Trinity Hot Springs FAQ page — operator · 2026-09
- Trinity Hot Springs About page — operator · 2024-05
- KIVI-TV Backroads feature — news · 2023
- Hot Springs Guides summary (updated 2026-07-25) — community · 2026-07
Additional references for this record; a source link does not guarantee current conditions.
- trinityhotsprings.club/membership
- trinityhotsprings.club/hot-spring
- hotspringslocator.com/trinity-hot-springs
Details above were verified against the named sources on their listed dates — conditions change, so recheck before traveling. · How we verify our data · Report a correction
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