Tags: Park.
Big Springs is the name of a first-magnitude spring located in Island Park Idaho in Fremont County. The spring produces over 120 million gallons of water each day. It is a primary source of the North Fork or Henrys Fork and is famous for its large trout. Big Springs is the only first-magnitude spring that issues from rhyolite lava flows. It is a National Natural Landmark designated in August 1980.
