Potosi Hot Springs Montana
Photo By Potosi Hot Springs

• Potosi Hot Springs was the battleground between counter-culture and local ranchers in 1971
• The resort's unique feature is a wood-burning sauna

Potosi Hot Springs is closed to public access until 2025

Potosi Hot Springs is a hidden geothermal mineral water oasis in the Maddison Valley, 54 miles west of Bozeman.

The history of the resort goes back to the 19th century. In 1892, Horace Walter, a carpenter from Indiana, built a swimming pool, bathhouse, and large hotel near the springs.

The resort changed ownership multiple times through the years and, at some point, even abandoned entirely.

In the 1960s, the spring became a popular spot for a counter-culture movement. By 1971, rumors of nudity and drug use made it to the local ranches. They, along with a sheriff, came to the spring, kicked squatters out, and burned down all the shacks. Sheriff even blew up the hot spring pool wall with dynamite.

In 2007, the Texas family purchased the resort and closed it to the public. In 2018, ownership changed again, and the spring was reopened.

Geothermal Water & Soaking

Geothermal mineral water emerges from a spring at 93° F (34° C) and is channeled into the pool and soaking tub.

The 25 ft x 50 ft pool is maintained at around 93° F (34° C).

The water in the indoor soaking tub is heated to 102° F (34° C).

The unique feature of the resort is a wood-burning sauna.

It is a family-friendly resort, so swimming suits are mandatory.

You can soak at the springs if you rent a cabin or book the pool for a private soak. There is no true day-use here because you will have to reserve the entire pool for the group.

Private pool time is between noon and 2 pm, Wednesdays through Saturdays.

Potosi Hot Springs Montana
Photo By Potosi Hot Springs

Beyond Hot Springs: Other Adventures

There is not food available at the springs. The nearest shop is 15 miles away in Harrison. Alternatively, there is a Pony Bar 7 miles away where you can have dinner from Friday till Sunday.

The area around the springs is an outdoor paradise with fishing, hiking, biking, ATV trails, and other adventures.

Camping & Lodging

The resort has 4 cabins with private bathrooms, kitchens, and wood-burning fireplaces. You can rent the cabins through the Airbnb.

Potosi Campground is a few miles up the Willow Creek.

Additionally, you can choose from multiple stays in the surrounding area.

Affordable short and long-term rentals near Potosi Hot Springs

Potosi Hot Springs | Facts

Location: 54 miles west of Bozeman • Southwestern Montana • USA
Open: Year-round
Development: Swimming pool, soaking tub, sauna
Clothing: Mandatory
Amenities & Services: Cabins

Hiking distance: Short
Road access: Any vehicle
Day-use fees: Yes

Elevation: 5,800 ft (1,768 m)

Water T° (source): 93° F (34° C)
Water T° (pool): 93° F (34° C)
Water T° (hot tub): 102° F (34° C)
Odor: None
Chemical used: None

Directions to Potosi Hot Springs

From Pony,

  • Take Potosoi Road for 3 miles
  • Turn right to stay on Potosi Road and follow it for 3.5 miles.

Phone: 406-595-0488

Address: 354 Potosi Rd, Pony, MT 59747

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