The southern butte, the tallest of the three buttes in Butte County, Idaho, towers 2,500 feet high with 2 overlapping rock domes and is also the youngest of the three at just about 300,000 years old.
Middle Butte (left) and Big Southern Butte (right) of the Three Volcanic Buttes that dominate the Idaho plains near Atomic City, the place of the first Nuclear Power PLant
