Big Southern Butte

Trail Flyer

Big Southern Butte is one of three rhyolitic domes near the center of the eastern Snake River Plain.  The area supports lodgepole pine, aspen, Douglas fir, and manzanita (not common to this region). The butte is one of the largest volcanic domes in the world but at 300,000 years old is also one of the youngest.  Hikers who trek to the 7,550-foot high summit are rewarded with spectacular panoramic views. Approximate season of use is mid-May through October, depending on conditions. Please call the Eastern Idaho Visitor Information Center at 208-523-1012 for more information.

Location: on Highway 20 between Arco and Idaho Falls, towards the south

Fees/Facilities: none