Smith Cabin Hot Spring lies in Boise County, Idaho. This thermal spring is enjoyed in an open-air pool or through wild bathing, surrounded by the forests and mountains typical of the region.
Insider tip — Smith Cabin Hot Spring in Boise County, central Idaho — remote backcountry geothermal spring near Warm Lake and the South Fork Payette River drainage. Free undeveloped soaking in Idaho's volcanic highlands. Idaho has more geothermal hot springs than any other US state except Nevada. Accessible via forest roads.