Big Southern Butte
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 snow levels and road conditions. This is a road, but is best traveled by ATV or UTV. Please call the Eastern Idaho Visitor Information Center at 208-523-1012 for more information.
WINTER CLOSURE: Big Southern Butte Road is now closed for the season. The road to Big Southern Butte is extremely hazardous in the winter because ice and snow accumulate on its steep grade. BLM officials expect the road to be closed until late Spring 2014, depending on snow levels and road conditions.
For more information regarding seasonal closures, please contact the BLM Upper Snake Field Office at 208-524-7500.
Location: From Arco, take the Country Road/300 North heading south (this is signed as the 'Arco OHV Route'). Turn east onto Arco-Minidoka Road/2930 North. Turn onto 2900 West heading south and turn west onto 2150 North, turn north onto 300 West which turns into 2225 North. Turn onto the Arco-Minidoka Road heading south for several miles. Turn east onto Quaking Asp-Frenchman Road toward Big Southern Butte. At Frenchman's Cabin, turn and head up the Butte.