Boat Box Hot Spring is one of the most unique hot springs in the Rocky Mountains.  Tucked away in the Sawtooth Mountains in Idaho, this spot came to be when, years ago, a local from the nearby town of Stanley bolted a metal caldron to a boulder in the middle of the Salmon River and ran a pipe in Elkhart Hot Spring, bubbling out of the river bank. The spring was rechristened, Boat Box, and has been a local favorite ever since.

    The tub is like no other public hot spring experience; falling somewhere between a ski lodge hot tub and getting cooked up in a witch's brew.  
     But that's not to say it isn't amazing. It is.
    The caldron is just big enough for two to soak comfortably but is  possibly best enjoyed solo. Soakers can adjust the water temp by moving the old pipe carrying the hot water and tempering the tub with cold river water using the tethered bucket. And then lean back and soak it up.