Butterfly and Groundhog Hot Springs | Central Idaho

Butterfly Hot Springs and Groundhog Hot Springs are natural hot springs located on the Middle Fork Payette River within the Boise National Forest. These springs are part of a collection of three soaking pools that can be accessed via hiking from Boiling Springs. To get to this spot, you must take a moderate 7-mile (11.3 km) out-and-back hike with a 450 ft elevation gain.

Butterfly Hot Springs and Groundhog Hot Springs are the final two springs along the trail, following Little Dipper Hot Springs and Moondipper/Pine Burl Hot Springs.

The best times to visit this place are from May to October when the trail conditions are more favorable, and the river levels are low enough to prevent the pools from flooding.

Geothermal Water & Soaking

Geothermal mineral water comes from the source at 140°F and flows 20 feet down the riverbank into the Groundhog Hot Springs pools. Depending on the river level, there may be one or two pools available. Since these pools are unmaintained, visitors should be prepared to move rocks or plug the pool walls as needed.

Butterfly Hot Springs sits upstream from Groundhog, with water source at 130°F. The water flows down the cliff into a rock-lined pool situated along the river’s edge. Due to its location, this pool is typically in better condition.

You can bring a tarp to make the bottom more comfortable and prevent water from leaking through the walls. If the water is too hot, mix in some river water to adjust the temperature.

Clothing is optional at both soaking pools, allowing visitors to embrace the natural experience fully.