Fountain of Youth RV Park
- Call for prices
- 100–104°F
- 2 hr 38 min from Casper
- Walk-in OK
An RV park north of Thermopolis built around a large mineral pool fed by the Sacajawea Well, drilled in 1918, which flows about 1.3 million gallons a day. Travel Wyoming lists the water at 100-104°F, and a 2024 report says new owners were restoring the pools and selling all-day passes to non-campers.
- Price
- Call for prices
- Water
- 100–104°F
- Nearest town
- Thermopolis
- From Casper
- 2 hr 38 min
- Reservations
- Walk-in OK
Plan your visit
Hours & season
| Season |
|
|---|
Tickets & booking
| Price |
|
|---|---|
| Access | Day pass, walk-ins welcome |
On site
| Pools | 3 |
|---|---|
| Camping nearby | Yes |
Not stated by the venue: swimwear, ages, dogs.
Water temperature
Soaking-pool temperatures as published by the venue or land agency; they vary with season and flow.
Mineral profile
Total dissolved minerals
1,935 mg/L
Highly mineralized · Calcium–sulfate (gypsum-type water)
- pH
- 6.6
- Temp at source
- 131°F
- Lithium
- 0.70 mg/L
- Fluoride
- 3.3 mg/L
Lab analysis of the source water at “Big Spring At Hot Springs State Park” (0.9 mi from Fountain of Youth RV Park), sampled 1984–1991 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 |
|---|---|
| Cooling pool | — |
| Hot tub | — |
| Swimming poolAbout 100°F at the far end. | 100°F |
As published by the venue. Temperatures shift with the seasons and the weather.
What's here
- large mineral pool fed by the 1918 Sacajawea Well
- about 1.3 million gallons a day
- RV sites on site
- pools being restored by owners since 2024
Getting there
- From Casper2 hr 38 min133 mi
- From Riverton (RIW)1 hr 21 min62 mi
Typical driving time without traffic or snow.
| Elevation | 4,318 ft |
|---|---|
| Road |
|
Things to do near Thermopolis
Hot Springs State Park terraces and Swinging Bridge
Mineral terraces on the Bighorn River, a suspension footbridge, 6+ miles of trails and the state bison herd
Legend Rock State Petroglyph Site
Petroglyph site run by Wyoming State Parks northwest of Thermopolis
Campgrounds
Straight-line distances. Campground and trailhead data © OpenStreetMap contributors.
Nearby springs
State Bath House (Hot Springs State Park)
A free bath house run by Wyoming State Parks in Hot Springs State Park, with an indoor and an outdoor soaking pool kept at about 104°F from springs that emerge at 128°F. The outdoor pool closed on Aug 24, 2026 for about a month while a pool lift, handrails and heated walkways were installed. The park around it has mineral terraces, the Swinging Bridge over the Bighorn River and the state bison herd.
TePee Pools
A commercial mineral-water pool complex in Hot Springs State Park with an indoor pool and water slide, an outdoor pool at 94-98°F and hot tubs up to 105°F. It also has a steam room and a cedar dry sauna. The site lists Carson Hot Springs and Jemez Hot Springs as sister properties.
Star Plunge
A family pool complex in Hot Springs State Park with indoor and outdoor mineral pools, water slides and a vapor cave, closed since Jan 14, 2025 after its concession agreement expired. On Jul 31, 2026 Wyoming State Parks announced a tentative settlement that would let a new long-term concessionaire reopen it, but no date has been set.
State Bath House (Hot Springs State Park): 1 mi · TePee Pools: 1 mi · Star Plunge: 2 mi
Sources (6)
· 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.