Idaho Hot Springs

Roystone Hot Springs - Sweet, Idaho

Since the 1800s, Roystone Hot Springs has been sought out by settlers, soakers, old-time laundry scrubbers and Indians in nearby fish camps. Featuring geothermal springs naturally flowing at 143 degrees straight from the ground, Roystone has always been a favorite local hot spot.

Roystone Hot Springs Pictures

Roy Stone Hot Springs Geothermal Steam Sun and steam
Covered Hot Pool Covered hot pool
Roy Stone Historical Photo Historical photo of Roystone Hot Springs

Roystone Hot Springs Facilities

The 50′ hot springs pool at Roystone is maintained at a comfy 98 degrees and is safe for babies and pregnant women. Open swim times are available or reserve the entire pool privately for a game of water basketball. Inquire about daily aerobics classes and weekly homeschool swimming.

Roystone additionally features a large jetted natural 104-degree hot tub that comfortably seats up to 12 people. Reserve a session after dark and enjoy a movie on the outdoor projector while you soak. Reserve along with the pool or separately.

Roystone is a FAMILY oriented party place for birthday parties, family reunions and campouts. Swim and then have cake in the party room or reserve our huge outdoor rec area which includes sand volleyball, a hot springs splash pad, picnic shelters and our fully loaded sports closet.

There is also a campground and RV park with full hookups available including fire pits, picnic tables and an event center.

History of Roystone

Throughout its many owners, Roystone Hot Springs has shown its amazing versatility. The fertile land around the mineral springs has been farmed using the warm water for irrigation. The fine vegetables, muskmelons and the orchard were known throughout the Boise Basin.

Later, locals worked to divert the many springs into one cemented catch basin and then built the same swimming pool still used at Roystone today. A photograph from 1909 shows long-skirted women standing next to the pool with laundry barrels and a loaded down clothesline -catching up on work after a swim.

Roystone Hot Springs was then purchased by a man named Roy Stone. He and his nurse turned wife, Eva, purchased it hoping that the healing waters would improve his poor health. Sadly, before he was able to make the move from Portland, he died, leaving it to Eva and her son. She named it in his honor and then built a sanitarium open to all who wished to utilize the mineral springs for their health.

After 2 fires and several more owners, the neglected hot springs were purchased by the Johns Family in the early 80s. Major remodeling and reconstruction of the pool, main house (originally used as a sanitarium and hotel) and surrounding areas have made Roystone what it is today.


Located in Sweet, ID halfway between Emmett and Horseshoe bend and about 45 minutes from almost anywhere in the Treasure Valley.