Thoroughbred Warm Springs
Thoroughbred Warm Springs registers 69°F at 5,922 feet in the Sawtooth National Forest, producing water only 24.7 degrees above ambient. Located about 1.2 kilometers from Thoroughbred Ridge Road, this is one of the cooler thermal features in southern Idaho's high country, better classified as a warm seep than a bathing spring.
The spring sits on high-elevation rangeland near the Idaho-Nevada border, where mountain mahogany, sagebrush, and scattered conifers cover the slopes. The terrain consists of rolling ridgelines and creek drainages carved into volcanic geology. Annual snowfall averages nearly 55 inches, and the average air temperature is 44.3°F, producing long winters and brief summers. Rock Creek flows through the broader drainage, providing a corridor of riparian habitat amid the otherwise dry uplands.
The low water temperature (69°F) makes this spring of geological interest rather than a soaking destination. Access requires a 1.2 km walk from Thoroughbred Ridge Road, which is a remote forest road best attempted with high-clearance vehicles. Visit between June and October, as snow closes higher roads in winter. Porcupine Springs Campground, 17 km away at 6,950 feet, provides reservable campsites with trail access.
The name references Thoroughbred Ridge, though the origin of that geographic name is not widely documented. The spring lies within Forest Service land that has been managed as part of the Sawtooth National Forest since the early 20th century. The broader area near the Idaho-Nevada state line was historically used for open-range cattle grazing, and grazing allotments remain active on adjacent public land.
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Overview Porcupine Springs Campground is located along the scenic Rock Creek Road, in southern Idaho. It sits at an elevation of 6,950 feet. Visitors enjoy the area for its abundance of trails and scenic beauty.Recreation Numerous hiking, biking, horseback riding and off-road vehicle trails begin within or near the campground, including Porcupine Springs, Ross Falls, Rim View, Pike Mountain and Third Fork trails. Fishing is popular on Rock Creek.Facilities This large campground contains three...
Thoroughbred Warm Springs sits at 5,922 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 24% stronger than at sea level, so bring sunscreen and drink more water than you normally would.
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Thoroughbred Warm Springs is road-accessible, so you can bring more gear. Cold air temperatures make a changing robe or warm layers essential.
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