Eastern Idaho's official tourism guide ranks Green Canyon second among the region's hot springs under the headline Fun in the Sun. It walks through the lineup: the 96 degree Big Pool, the 105 degree Hot Pool, the 115 degree Spring Pool, and a 55 degree Cold Pool for anyone brave enough.
It also covers what to know before you go. Hours change with the seasons, campsites run from dry camping to full hookups and need a reservation, ATVs stay on the trailer, and it is about 30 miles from Idaho Falls.