Lone Butte is a 4,780-foot volcanic summit in Washington within the Indian Heaven volcanic field and part of the Pacific Ring of Fire. It is a tuya, a volcano with steep, flat-sided form created by eruptions beneath ice. Its most recent eruption likely occurred during a glacial period, either in the Hayden Creek glaciation about 130,000 to 150,000 years ago or in the early Wisconsin glaciation about 70,000 to 90,000 years ago. That icy setting shaped Lone Butte’s unusual profile and makes it one of the region’s ice-influenced volcanoes.