Roystone Hot Springs - Idaho

Roystone Hot Springs is a historic site offering an enjoyable soaking and swimming in mineral-rich water
Features a large warm swimming pool and a small hot pool

Sitting in Idaho's Sweet unincorporated community between Emmett and Horseshoe Bend, Roystone Hot Springs is a family-friendly location offering an enjoyable soaking in hot mineral water and gives you a chance to organize an itinerary with multiple outdoor activities close to each other.

The history of the hot springs goes all the way back to the 1800s. Native Americans as well as European settlers used hot mineral water for soaking, laundry, and even for irrigation. At some point, locals decided to build a massive cemented tub and divert the geothermal water of multiple springs into it.

Hot mineral water flows out of the ground at a temperature of 143°F. Before entering a large 50 feet pool, the water is cooled down to 98°F to make it comfortable for all visitors including pregnant women and babies. If you would like to enjoy hotter mineral water, you can soak in a jetted hot tub with a water temperature of 104°F. The soaking tub can accommodate up to 12 people.

This hot spring place is tailored towards family gatherings. The entire pool can be reserved for the family or used by anyone during open time. The party room of the outdoor recreational area can also be reserved for family events, birthdays, or just get-togethers. The outdoor recreational area provides a sand volleyball court, picnic shelter, hot spring splash pad for kids, and a variety of sports equipment to use.

Campground and RV Park along with fire pits, picnic tables, and event center are available for overnight visitors.

Roystone Hot Springs - Idaho

Roystone Hot Springs - Idaho

Roystone Hot Springs - Idaho

Roystone Hot Springs | Facts

Location: 13 miles northeast of Emmett • Idaho • USA
Open: Year-round
Development: A large warm swimming pool and a small hot soaking pool with jets and bubblers
Clothing: Required
Amenities: Changing rooms, shower, event center, picnic areas and tables
Accommodations: Tent and RV campground
Hiking distance: Short
Road Access: Any vehicle
Day-use: Yes with fees, reservation is required

Elevation: 2,600 ft (792 m)

Water T° (source): 143°F (62°C)
Water T° (large pool): 98°F (37°C)
Water T° (soaking pool): 104°F (40°C)
Water acidity level: Slightly alkaline (pH=7.5)
Springs Type: Sodium Bicarbonate
Chemical used: Yes, chlorine

Sodium (Na) - 160 Mg/L
Calcium (Ca) - 8.7 Mg/L
Potassium (K) - 7.7 Mg/L
Magnesium (Mg) - 0.6 Mg/L
Bicarbonate (HCO3) - 187 Mg/L
Silica (SiO2) - 120 Mg/L
Sulfate (SO4) - 110 Mg/L
Chloride (Cl) - 62 Mg/L
Fluoride (F) - 16 Mg/L
Phosphate (PO4) - 0.4 Mg/L

More Adventures

Directions to Roystone Hot Springs

From Boise,

  • Head northwest on State Street/ID-44 to Highway ID-55
  • Turn right onto ID-55 and follow 19.5 miles north to Highway ID-52
  • Turn left onto ID-52 and continue 10 miles west to the destination on the right.

Phone: 208-584-3371

Address: 7880 N Highway 52, Sweet, ID 83670

Leave a Reply

Your email address will not be published. Required fields are marked *