Roystone Hot Springs – Sweet, Idaho
OpenOpen seasons
Conditions checked November 2026 · Fees verified November 2026
- Access
- Reservation-only. Every soak is private to the reserving group. Non-camping guests must leave between 10:30 PM and 8:00 AM, per the operator's rules.
- Price
- Pool session rates are shown during online booking. RV Park $40/night plus tax (up to 4 people and 1 pet; extra people or pets $3/day each). Guest House $300/night (up to 8 people). Spring House Event Center $1,100 (24-hour package).
- Reservations
- Mandatory. Cancellations require 48 hours notice to avoid a non-refundable fee. On arrival, call or text (208) 584-3371 to check in.
- Accommodations
- 10 full-hookup RV sites (pool and hot tub not included), the Guest House, and the Spring House Event Center (capacity 150).
Plan Your Visit
Roystone Hot Springs is a reservation-only hot springs, RV park, and event center in Sweet, Idaho — about 45 minutes from the Treasure Valley, halfway between Emmett and Horseshoe Bend.
Roystone Hot Springs Pictures
Roystone Hot Springs Facilities
Main Pool
The natural hot springs pool runs 93 degrees in the summer to a steamy 98 degrees in winter. Roystone’s pool uses salt water chlorination to reduce chemical use, and the pool can be reserved for private use, with a changing room and shower.
Hot Tub
The naturally heated, jetted hot tub seats up to 12 people and is kept at about 104 degrees. After-dark and winter soaks are still allowed; children under 8 are not allowed in the hot tub.
The grounds include a basketball/pickleball court, volleyball, a hot springs splash pad, a fully equipped playground, and picnic areas. Beach toys and pool noodles are provided.
Event Center
The Spring House Event Center suits large groups, with a double kitchen, banquet room, TV room, and a 60-foot hot stone-wrapped wall. The center accommodates up to 150 people.
RV Park
Each of the 10 RV sites includes full hookups, a fire pit, a picnic table, and a large section of turf. Roystone does not include pool and hot tub use with an RV site.
History of Roystone
Throughout its many owners, Roystone Hot Springs has shown its versatility. The fertile land around Sweet, Idaho, is good for growing crops, but the warming hot springs also turn it into a place for relaxation and rejuvenation.
Roystone Hot Springs Need to Know
- Address: 7880 Hwy 52, Sweet, ID 83670
- Phone: (208) 584-3371 (call or text to check in)
- Reservations: Mandatory; 48-hour cancellation policy
- Hot tub: Children under 8 are NOT allowed
- Session rates: Shown during online booking
- RV Park: $40/night plus tax (4 people and 1 pet; extra people/pets $3/day each); 10 full-hookup sites plus pull-through
- Guest House: $300, includes 8 people
- Spring House Event Center: 24-hour package $1,100; capacity 150
- Hours: Soaks are by reservation; session times are set when you book.
- GPS: 43.951, -116.353
Driving Directions
Roystone is on Highway 52 in Sweet, Idaho, halfway between Emmett and Horseshoe Bend, about 45 minutes from Boise.
More hot springs in South-Central Idaho →
Frequently Asked Questions
Is the pool private at Roystone Hot Springs?
Yes. Every reservation is exclusive use: your group gets the entire pool for the full session.
How much does Roystone Hot Springs cost?
Pool session rates are shown during online booking. For stays, the RV Park is $40 a night plus tax, the Guest House is $300 a night for up to 8 people, and the Spring House event center is $1,100 for a 24-hour package.
Do I need a reservation at Roystone Hot Springs?
Yes, reservations are mandatory, and cancellations require 48 hours notice to avoid a non-refundable fee. On arrival, call or text the office at (208) 584-3371 before entering the pool gates.
Is the pool included with an RV site at Roystone?
No. The pool and hot tub are not included in the RV Park nightly rate; they are booked separately by reservation.
Discover more from IdahoHotSprings.com
Subscribe to get the latest posts sent to your email.
Join the Community on Facebook
Stay updated on seasonal road closures, wildfire impacts, soaking conditions and community preservation efforts across Idaho.
Follow Idaho Hot Springs on Facebook
