Union Peak with Mount McLoughlin in the background as seen from Crater Lake.
|Elevation||7,714 ft (2,351 m)|
|Location||Klamath County, Oregon, U.S.|
|Topo map||USGS Union Peak|
|Volcanic arc||Cascade Volcanic Arc|
Union Peak is a heavily eroded shield volcano in the Cascade Range of central Oregon, located along the Cascade Crest less than 7 miles (11.3 km) southwest of the rim of Crater Lake. Ice Age glaciers eroded away most of the flanks of the volcano, leaving numerous deep cirques surrounding a central glacial horn. This is the same process that formed the summit horns of Three Fingered Jack, Mount Washington, Howlock Mountain, and Mount Thielsen from other shield volcanoes farther north in the Oregon Cascades.
Union Peak is located within Crater Lake National Park, and the summit was used as a post for fire lookouts from the 1930s to the 1950s. A 5.5 miles (8.9 km) trail leads to the summit from the Pacific Crest Trail off Oregon Route 62.
- Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.). Mountain Press Publishing Company. ISBN 0-87842-511-X.
- Wood, Charles A.; Jürgen Kienle, eds. (1990). Volcanoes of North America. Cambridge University Press. ISBN 0-521-43811-X.
- Kresek, Ray (1998). Fire Lookouts of the Northwest (3rd ed.). Historic Lookout Project. ISBN 0-87770-632-8.
- "Union Peak". Geographic Names Information System, U.S. Geological Survey. Retrieved 2008-11-22.