Quick FactsOverview
About Roystone Hot Springs
Roystone Hot Springs, Idaho is a family-owned geothermal resort in Sweet Valley on Highway 52, approximately 35 miles northeast of Boise and 13 miles northeast of Emmett in Gem County. Dating to the 1800s, the property today operates as a managed facility with a covered 50-foot concrete pool and a separate jetted hot tub. Geothermal water emerges at approximately 143 degrees Fahrenheit and is cooled and treated with chlorine. The main pool ranges from 95 to 99 degrees, is covered by a vaulted roof with open sides, and has water depths of 3 to 6 feet. The jetted hot tub maintains 104 degrees and seats up to 12 people. Each reservation is exclusive, meaning your group has the entire pool or tub to itself for the full session.
Additional amenities include RV sites with full hookups, tent camping, a guest house, a 3,500-square-foot event center seating up to 150 guests, a party room, and a recreation area with volleyball, horseshoe pit, splash pad, frisbee golf, pickleball and basketball court, and a bonfire pit.
For those seeking accessible hot springs Idaho offers near Boise with a fully private session, Roystone fills a distinctive niche. The exclusive-access model suits families, couples, and groups who prefer a private experience rather than shared public pools.
Location & Access
Getting to Roystone Hot Springs
Roystone Hot Springs is at 7882 N Highway 52, in the community of Sweet, Gem County. From Boise, take State Street west to Highway 55 North, drive approximately 19.5 miles to the Highway 52 junction, turn left and follow Highway 52 West for approximately 10 miles to the resort at milepost 44. The drive from Boise takes approximately 50 minutes. From Emmett, take Highway 52 northeast for 13 miles. Any standard vehicle can reach the property on paved roads.
The resort notes that GPS may be unreliable for the final approach; look for milepost 44 on Highway 52 as a visual guide. Parking is free and on site. Highway 52 is a paved two-lane road with light traffic between Emmett and Horseshoe Bend. The Sweet Valley setting is rural and open, with ranchland and low hills surrounding the property.
For those seeking hot springs near Emmett Idaho as a day trip from the Boise area, Roystone is the primary developed geothermal facility in the region. The Payette River for boating and kayaking is minutes from the property. Emmett and Horseshoe Bend both offer fuel and food for the journey.
Reservations are mandatory for all pool and hot tub sessions, camping, the guest house, and the event center. Walk-in access is not available. Book online at roystonehotsprings.com or call (208) 584-3371 well before your visit, as exclusive sessions fill quickly on weekends.
Suitability & Accessibility
Who Can Visit Roystone Hot Springs
Roystone Hot Springs suits families with children, groups, couples, and individuals seeking a fully private soaking experience near Boise. The exclusive-access model means each reservation secures the entire pool or hot tub for the group alone, which makes it especially practical for families with young children, parties celebrating events, or anyone who prefers not to share pool space with strangers. The pool depth of 3 to 6 feet accommodates both shallow-water wading and casual swimming.
Swimwear is required throughout all pool and hot tub areas. The facility is not clothing optional. Pets are welcome in the camping areas but are not allowed near the pools. The grounds include a dog-friendly recreation area. Children of all ages are welcome and the splash pad and recreation amenities are designed with families in mind.
The facility lists handicap accessibility, with pool entry via roomy stairs with handrails. Visitors with specific mobility requirements should contact Roystone directly at (208) 584-3371 before booking to confirm which areas of the property are accessible and what accommodations are available. The resort is open year-round, and the covered pool structure allows comfortable soaking in cold weather.
For those seeking accessible hot springs Idaho offers within a short drive of Boise, Roystone provides a year-round option with the added benefit of complete privacy during each session. The event center makes it a viable venue for group celebrations combined with a soaking experience. Reservations are mandatory for all areas including camping.
Safety & Etiquette
Safety at Roystone Hot Springs
Roystone Hot Springs is generally safe as a staffed, managed resort with controlled pool temperatures and exclusive-access sessions. The main pool runs at 95 to 99 degrees Fahrenheit and is suitable for most ages including young children. The jetted hot tub at 104 degrees is warmer and less appropriate for extended immersion by small children or anyone with heat sensitivity. Exit the hot tub and cool down if you feel lightheaded, overheated, or unwell during a session.
The pool water is treated with chlorine and drained and cleaned regularly. Geothermal water at the source is approximately 143 degrees Fahrenheit. The cooling and treatment system keeps the usable pools well within a safe soaking range, but visitors should always test the water when first entering and before allowing children to use the pools unassisted.
The pool has a depth range of 3 to 6 feet, with shallow areas suitable for non-swimmers and deeper sections for those who swim. The entry stairs have handrails. Children should be supervised at all times in and around both the pool and the hot tub. The pool area includes a Bluetooth speaker system and projector for use during sessions; confirm any equipment use and rules with staff at the time of your reservation.
Highway 52 is the main access road and carries two-way traffic. Drive at posted speeds and be aware of agricultural machinery and farm vehicles common to the Sweet Valley area. The resort is in a rural location approximately 35 miles from Boise. Emergency services are available through Gem County, with the nearest hospital services in Emmett or Boise. The resort is staffed during operating hours. Reservations are mandatory; all sessions are private and supervised by guests during their exclusive booking window.
