Elevation: 5,695 ft
This peak is not in the book. Published November 2022
Sixmile Butte is a rather insignificant hump that is located just east of the Arco-Minidoka Road about nine miles south of Arco, Idaho. It is most easily climbed via its west face. This climb is entirely on BLM land. USGS Arco South
The Arco-Minidoka (A-M) Road begins southwest of Arco, just off US-20. From the junction of US-20 and US-93 in downtown Arco, drive west on US-20 for 1.9 miles. Turn left/south onto [signed] 3100W. This is the A-M Road. Drive 7.8 miles south then southeast on the A-M Road to a cattle guard at a 4-way junction. About 50 yards past the cattle guard, there is a 2-track road to the left/east. Park at the base of this road (5,400 feet). GPS coordinates: 43⁰30’30”N, 113⁰16’21”W. Sixmile Bute is obvious from here and has an antenna on top.
West Face, Class 2
From the road junction, follow the 2-track road briefly but leave it when it turns left/north and bushwhack directly at the summit through easy, gapped sagebrush to reach the boulder-and-sage summit of Sixmile Butte. There are three potential high points close to each other: the antenna, a large rocky outcrop to the southeast, and the true/west summit. There is a broken-down cairn atop the true summit. The 2-track road is probably a service road that leads to the summit but it is a longer hike than the route described.
Regions: SNAKE RIVER PLAIN
Mountain Range: Snake River Plain
Longitude: -113.25369 Latitude: 43.51289