Middle Fork Lodge Hot Springs

## Overview Middle Fork Lodge Hot Springs is a remote natural hot spring located deep in the Idaho backcountry, near the Middle Fork of the Salmon River at approximately 44.7161° N, 115.0155° W. Situated in the heart of the Frank Church–River of No Return Wilderness — the largest contiguous wilderness area in the lower 48 states — this hot spring offers a truly off-the-grid soaking experience surrounded by rugged mountain terrain and pristine forest. The Middle Fork of the Salmon River corridor is renowned for its abundance of natural hot springs, many of which have been used for centuries by the Shoshone-Bannock and Nez Perce peoples who historically inhabited and traveled through this region. The geothermal activity in this area is driven by deep fault lines and volcanic geology characteristic of central Idaho's batholith, which heats groundwater as it circulates far below the surface before rising back up through fractures in the rock. Middle Fork Lodge Hot Springs takes its name from its proximity to the historic Middle Fork Lodge, one of several remote backcountry lodges that have operated along the Middle Fork of the Salmon River corridor. The area is accessible primarily by bush plane, jet boat, or multi-day river trip, making it one of the more secluded hot spring destinations in the American West. ## Directions 1. Middle Fork Lodge Hot Springs is located in the Frank Church–River of No Return Wilderness in central Idaho, near the Middle Fork of the Salmon River. 2. The GPS coordinates are **44.7161, -115.0156**. Due to the extreme remoteness of this location, standard road access is very limited. 3. **By River:** The most common way to reach this area is via a multi-day rafting or kayaking trip down the Middle Fork of the Salmon River. The hot spring is located along the river corridor and can be accessed from the water. 4. **By Air:** Several backcountry airstrips exist along the Middle Fork corridor. Charter bush plane services from communities such as Stanley, McCall, or Challis can provide access to nearby landing strips. 5. **By Trail:** Backcountry hiking trails do penetrate the wilderness area, but expect multi-day treks over rugged terrain. A detailed topographic map and backcountry navigation skills are essential. 6. A wilderness permit is required for entry into the Frank Church–River of No Return Wilderness. Check with the Salmon-Challis National Forest for current permit requirements and seasonal availability. ## What to Expect Visitors to Middle Fork Lodge Hot Springs can expect a quintessential Idaho backcountry hot spring experience. The setting is wild and remote — towering ponderosa pines, steep canyon walls, and the sound of the Middle Fork of the Salmon River define the landscape. The hot springs in this corridor typically feature naturally heated water emerging from the ground at varying temperatures, often pooling in rock-lined soaking areas along the riverbank. Water temperatures can vary seasonally and may be influenced by river levels, particularly during spring runoff when the river runs high and cold water can mix with the thermal pools. Because of its location within designated wilderness, there are no developed facilities — no restrooms, changing areas, or maintained paths. Visitors should come fully prepared for backcountry conditions, including bringing all supplies in and packing all waste out (Leave No Trace principles are strictly observed here). The best time to visit is typically during the summer and early fall months (June through September), when river levels are more manageable and weather conditions are favorable. Winter access is extremely difficult due to snow and cold temperatures at elevation. Cell phone service is nonexistent in this area. Visitors should carry a satellite communication device for emergencies. Wildlife in the area includes black bears, mountain lions, elk, and wolves — proper food storage is essential.