Clarendon Hot Springs runs 126 degrees Fahrenheit from a roadside source just 280 feet off a forest road in the Sawtooth National Forest. The alkaline water registers pH 9.1 with soft, sodium-dominant chemistry at 5,720 feet elevation near Hailey. Federal land means year-round public access.
The spring sits in a narrow drainage along National Forest Development Road 097, where lodgepole pine and Douglas fir frame a modest flow of clear, alkaline water. At 5,720 feet in the Sawtooth foothills, winter brings over six feet of snow, and the thermal plume stands out sharply against cold air. The ground near the source carries a faint sulfur note from the 52 mg/L sulfate content. Blaine County's dry climate keeps the surrounding slopes open and grassy between timber stands.
History of Clarendon Hot Springs
Clarendon draws from the same deep geothermal system that feeds several springs along central Idaho's Snake River Plain volcanic province. Its pH of 9.1 and negligible calcium and magnesium point to water that has circulated through silicic volcanic rock at depth, dissolving sodium and silica while leaving heavier minerals behind. The 318 mg/L total dissolved solids concentration is moderate for this region's thermal features.
The spring is roughly 85 feet from the forest road, making it one of the more accessible thermal sources in the Sawtooth National Forest. North Fork Campground lies about 25 miles north along the Big Wood River with reservable sites. Snow typically persists from November through April at this elevation, so plan accordingly and check road conditions with the Sawtooth NF ranger district.
Is Clarendon Hot Springs worth visiting?
Best for
- Hot spring soaking
- Easy day trips
- Overnight camping trips
Clarendon Hot Springs offers an accessible hot spring experience — great for a day trip.
Annual Precip: 18.4 in
Annual Snow: 76.4 in
December
Air 18°F · Water 126°F · +108° contrast
January
Air 20°F · Water 126°F · +106° contrast
February
Air 23°F · Water 126°F · +104° contrast
December offers 50°F more contrast than July
Recent Temperature
122.0°F
(50.0°C)
Measured May 11, 1988
The water at Clarendon Hot Springs is alkaline (pH 9.1) with 318 mg/L total dissolved solids.
pH influences mineral absorption through skin
Higher mineral concentration for therapeutic soaking
May support bone density and joint health
Known for muscle relaxation and stress relief
Supports circulation and skin hydration
Traditionally used for skin conditions and inflammation
Natural antiseptic with skin health benefits
Iron-rich springs may support circulation
Overview
North Fork Campground is situated on the banks of the beautiful Big Wood River at an elevation of 6,300 feet. Visitors enjoy fishing and tubing on the river and exploring the Harriman Trail.Recreation
This site is part of the Sawtooth National Recreation Area, where outdoor activities abound. Fly-fishing for rainbow, brown and brook trout is popular on the Big Wood River, as is float tubing.
The 20-mile Harriman Trail leads past the campground, offering excellent hiking and biking...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Warm layers
Cold air before and after soaking
Camping gear
Nearby camping at North Fork (Id)
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
USGS Quad: MAHONEY BUTTE 7.5 · PP 492: 151.0 · NOAA: 13.0 · AMS Map: HAILEY
What is the water temperature at Clarendon Hot Springs?
Clarendon Hot Springs has a water temperature of 126°F (52°C). This is considered a hot spring, well above body temperature.
Where is Clarendon Hot Springs located?
Clarendon Hot Springs is located in Blaine County, Idaho at 5,720 feet elevation, near Hailey. Coordinates: 43.5610°N, 114.4150°W.
How do I get to Clarendon Hot Springs?
Clarendon Hot Springs has Roadside road access, with the nearest road being National Forest Development Road 097 (280 ft from the road).
Is Clarendon Hot Springs free to visit?
Clarendon Hot Springs has Open access. It is managed by US Forest Service.
Can I camp near Clarendon Hot Springs?
Yes, North Fork (Id) is located nearby (15.7 miles away).
What minerals are in the water at Clarendon Hot Springs?
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 9.1 (alkaline). Total dissolved solids measure 318 mg/L.
Is it safe to soak at Clarendon Hot Springs?
At 126°F, Clarendon Hot Springs is hot enough to require caution. Enter slowly, limit soaking sessions to 15–20 minutes, and stay hydrated. Always tell someone your plans before visiting remote hot springs.
Is Clarendon Hot Springs crowded?
Clarendon Hot Springs is accessible from a paved road, making it easy to reach. Weekends and holidays may be busier — consider visiting on a weekday for a quieter experience.
What should I bring to Clarendon Hot Springs?
Essentials for Clarendon Hot Springs: swimsuit, towel, water bottle, warm layers for before and after soaking, camping gear, a trash bag to pack out what you pack in. The water is over 110°F — test the temperature before entering and watch for scalding near the source.