Rosalys Warm Spring
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
Rosalys Warm Spring is a Blaine County spring about thirty-nine miles from Sun Valley and a third of a mile from the nearest road. Despite the name, the water is above body heat, hot enough to feel like a bath. Land owner and access are not on record. Outlet Campground is a few miles away.
High, around sixty-five hundred feet, with heavy snow, thirteen and a half feet across an average winter. The walk from the car is short. The road itself has no name in the record. Nothing is listed for a land unit or a designation, and the record is quiet on what the ground looks like.
Winter months are the listed best, though with that snowpack you need the road open. Outlet Campground, a few miles away, is the camping on file. No fee entry. The chemistry is from 1979. Check who owns the land and if you are allowed on it. The record says nothing either way.
Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Rosalys Warm Spring.
- Setting
- Hillside
- The spring sits on a steep slope that climbs to the northwest.
- Highest ground nearby
- 257 ft above the spring
- Within a quarter mile, to the northwest
A slice through the ground from northwest to southeast, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about 2½ times the US average of 65. It's higher than at 94% of the springs on this site.
Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
The water at Rosalys Warm Spring is alkaline (pH 9.4).
Overview Outlet Campground is located next to beautiful Redfish Lake beneath the Sawtooth Mountain Range at an elevation of 6,500 feet. Recreation Outlet Campground is in the heart of the beautiful Sawtooth National Recreation Area, where outdoor activities abound. Redfish Lake offers excellent boating, water skiing, canoeing, kayaking and fishing for rainbow trout and Kokanee salmon. Little Redfish Lake is just down the road, offering additional fishing and canoeing. In the immediate are...
Rosalys Warm Spring sits at 6,560 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 26% stronger than at sea level, so bring sunscreen and drink more water than you normally would.
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