Mundo Hot Springs Experience

Geothermal water emerges at about 160°F (71°C) and is piped to two outdoor soaking areas: a large mineral pool, typically around 102°F (39°C) and slightly cooler in summer for longer soaks, and a hot tub maintained near 106°F (41°C) for a toasty, therapeutic experience.

Fresh spring water continuously refreshes both pools, so no chemical treatment is needed. The large pool is drained and refilled weekly. Guests will notice clean, clear mineral water with a soft feel and little to no sulfur odor.

Swimwear is required, and the area has bathrooms, changing rooms, and showers.

Mundo Hot Springs is an excellent base for outdoor recreation. The nearby Weiser River Trail offers hiking and biking along an 84-mile rail-trail that parallels the river and farmland.

Seasonal fishing and mellow rafting sections provide water-based fun, while wildlife viewing is common, with raptors, waterfowl, deer, and songbirds along the riparian corridors.

Day trips are easy, including Hells Canyon—the deepest river gorge in the U.S.—where you can enjoy viewpoints, jet boat tours, and rugged hiking.

After a soak, the on-site bistro serves simple, satisfying fare including snacks, homemade soups, sandwiches, salads, and desserts—perfect for a mellow afternoon by the pool.

Location: 105 miles north of Boise • Idaho • USA
Open: Year-round Wednesday through Sunday
Development: Resort, a soaking tub, and a pool
Clothing: Required
Amenities: Bistro, bathrooms, changing rooms, and showers

Hiking distance: Short
Road Access: Any passenger vehicle
Day-use: Yes

Elevation: 2,600 ft (792 m)

Water T° (source): 160°F (71°C)
Water T° (hot tub): 106°F (41°C)
Water T° (pool): 102°F (39°C)
Chemical used: None
Odor: None

Sulfate (SO4) - 201 Mg/L
Sodium (Na) - 190 Mg/L
Chloride (Cl) - 143 Mg/L
Silica (SiO2) - 71 Mg/L
Calcium (Ca) - 16 Mg/L
Potassium (K) - 3.3 Mg/L
Boron (B) - 5.5 Mg/L
Fluoride (F) - 1.78 Mg/L
Lithium (Li) - 0.054 Mg/L