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Wild spring

Hospital Bar Hot Springs

  • Free
  • Roadside

A riverside hot spring at Hospital Bar camp, river mile 52.1 on the Middle Fork of the Salmon in the Frank Church-River of No Return Wilderness. The Forest Service lists it as one of six hot springs camps on the float; each permitted group may be assigned only one, and it is not guaranteed. The agency warns that some Middle Fork springs are hot enough to burn and bans soap in hot springs.

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Price
Free
Nearest town
Stanley
Hike (one way)
Roadside

Plan your visit

Hours & season

Season
  • Seasonal
  • Permit needed year-round
  • Boundary Creek road usually opens late May or early June
  • Lottery season May 28-Sep 3

Tickets & booking

Price
  • No fee for the spring
  • Middle Fork float permit: $6 reservation fee plus $4/person/day or a $40 season pass
AccessFree public access
Booking
  • Lottery Dec 1-Jan 31 for May 28-Sep 3 launches
  • One hot springs camp per group, not guaranteed
  • Hospital Bar camp holds 30

On site

LodgingNo
Camping nearbyYes
Land managerUSFS

Not stated by the land manager: swimwear, ages, dogs.

Soak responsibly

  • Pack out everything, including food scraps and toilet paper. Use WAG bags where required.
  • No soap, shampoo or sunscreen in the pools; rinse away from the water.
  • Check permits and closures with USFS before you go.
  • Keep groups small and give others space. Respect posted dog and camping rules.

Water temperature

This venue doesn't publish pool temperatures.

Mineral profile

Total dissolved minerals

288 mg/L

Lightly mineralized · Sodium–sulfate (sodium sulfate water)

Sodium88.5 mg/L
Calcium3.4 mg/L
Magnesium0.00 mg/L
Potassium1.4 mg/L
Chloride14 mg/L
Sulfate42 mg/L
Silica53.5 mg/L
pH
8.9
Temp at source
115°F
Lithium
0.12 mg/L
Fluoride
17 mg/L
Boron
0.11 mg/L

Lab analysis of the source water at “17n 14e 05bab1s Hospital Hot Springs”, sampled 1971–1980 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.

What's here

  • Middle Fork of the Salmon Wild and Scenic River
  • reached only by permitted river float
  • Forest Service hot springs camp at river mile 52.1 (left bank)
  • Frank Church-River of No Return Wilderness
  • no soap in hot springs
  • heritage-site camp: do not gather downed wood

Getting there

Elevation4,077 ft
Road
  • Reached on foot
  • No road access
  • Boundary Creek launch is ~25 mi of single-lane dirt road (FS 568/579) off Hwy 21, 23 mi west of Stanley
Trail
  • River camp at mile 52.1, left bank
  • Reached by boat

Things to do near Stanley

park

Frank Church-River of No Return Wilderness

About 2.4 million acres, the largest contiguous wilderness in the Lower 48; the Middle Fork runs 104 miles through it.

other

Middle Fork of the Salmon River float

Permitted multi-day float from Boundary Creek to the Main Salmon; up to 8 days for groups of 1-10.

Campgrounds

Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.

Nearby springs

Sunflower Hot Springs: 12 mi · Sheepeater Hot Springs: 25 mi · Challis Hot Springs: 37 mi

Sources (5)

· 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.

  1. Official site: Middle fork salmon river
  2. Official site: home
  3. recreation.gov
  4. Official site: Users Guide to the Frank.pdf
  5. Official site: Wilderness