Skull Cave, measuring 580 feet (177 meters) in length, is categorized as one of the "Least Challenging Caves." Its expansive and open interior is particularly appealing to those who prefer not to navigate tight, confined spaces. What sets this cave apart is its unique geological history, formed as a result of three substantial lava tubes layered atop one another. This arrangement effectively traps cold winter air inside, resulting in the creation of an enduring ice floor on the lower level. Accessible through a smooth trail and a metal stairway leading to a platform, this cave's name is derived from the discovery of pronghorn and bighorn sheep bones, as well as two human skeletons found within its depths.