The Cave was formed when basalt lava flowed out of a vent 500 thousand years ago forming a lava tube typical to this type of volcanic activity on the Snake River Plains. It was important to early settlers and native Americans for food storage. John A. Dalton, the original homesteader, and his family also used the Cave as a refuge from encounters with unfriendly native Americans. Travel north on SH 34, turn right (east) onto Ice Cave Road and proceed 0.15 mile to the pull off on the left (north) side of the road above the Ice Cave Entrance. View a 360 panorama photo of the inside of the cave by Don Bain.