Weiser Warm Springs
Weiser Warm Springs produces water at just 72°F with a trickle discharge of 0.04 cubic feet per second, making it a low-flow, low-temperature thermal seep. Roadside access puts it only 57.5 meters from the nearest road at 2,146 feet elevation in Washington County. The slightly acidic pH of 6.6 is unusual among Idaho thermal features.
The spring sits in the dry foothills of far western Idaho near the Oregon border, where annual rainfall averages under 12 inches and snowfall barely reaches 20 inches. Sagebrush and bunchgrass dominate the surrounding semi-arid terrain at this low elevation. The Snake River corridor lies nearby, and the landscape opens into broad valleys with scattered irrigated farmland. The town of Weiser sits close by along the Weiser River confluence with the Snake.
The spring shares its name with the nearby town of Weiser, which was established as a railroad stop in the 1880s. Limited historical documentation exists for this specific thermal feature, and it has seen no commercial development. The high sulfate content (180 mg/L) and sodium levels (130 mg/L) suggest deeper geothermal circulation than the mild surface temperature implies.
Mann Creek Reservoir, about 15.8 kilometers away, has a reservable campground and offers fishing and boating. The spring itself is minor and not suited for soaking due to its low temperature and negligible flow. The area is accessible year-round given its low elevation and light snowfall. Summer temperatures can exceed 100°F, so bring sun protection and plenty of water.
Is Weiser Warm Springs worth visiting?
Best for
- Easy day trips
- Overnight camping trips
The water at Weiser Warm Springs is slightly acidic (pH 6.6).
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Overview Mann Creek Campground is located near the Mann Creek Reservoir in the foothills of the West Central Mountains in western Idaho near the Payette National Forest. The reservoir is a popular boating and fishing destination. Once on-site, you may be able to pay for your campsite(s) by scanning a QR code using the Recreation.gov mobile app, and the Scan and Pay feature. If this option is available, you will need to first download the free Recreation.gov mobile app https://www.recreation....