Williamson Mountain, elevation , is a peak in the

Cascade Range The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, ...

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

. It is named after Lt.

Robert S. Williamson Robert Stockton Williamson (January 21, 1825 – November 10, 1882) was an American soldier and engineer, noted for conducting surveys for the transcontinental railroad in California and Oregon. Inducted into the Army Corps of Engineers in 186 ...

, who with Lt.

Philip Sheridan General of the Army Philip Henry Sheridan (March 6, 1831 – August 5, 1888) was a career United States Army officer and a Union general in the American Civil War. His career was noted for his rapid rise to major general and his close as ...

took part in the

Pacific Railroad Surveys The Pacific Railroad Surveys (1853–1855) were of a series of explorations of the American West designed to find and document possible routes for a transcontinental railroad across North America. The expeditions included surveyors, scientists, and ...

in central Oregon in 1855. The

United States Board on Geographic Names The United States Board on Geographic Names (BGN) is a federal body operating under the United States Secretary of the Interior. The purpose of the board is to establish and maintain uniform usage of geographic names throughout the federal governm ...

approved the name in 1931. Before that, the peak was known by its Chinook Jargon name of ''Leloo Mountain'' (Wolf Mountain), derived from the French ''le loup'' (the wolf). The mountain lies slightly east of the border between Lane County and Deschutes County in the

Deschutes National Forest The Deschutes National Forest is a United States National Forest located in parts of Deschutes, Klamath, Lake, and Jefferson counties in central Oregon. It comprises along the east side of the Cascade Range. In 1908, the Deschutes National ...

and the

Three Sisters Wilderness The Three Sisters Wilderness is a wilderness area in the Cascade Range, within the Willamette and Deschutes National Forests in Oregon, United States. It comprises , making it the second largest wilderness area in Oregon, after the Eagle Cap Wilde ...

, southwest of

Mount Bachelor Mount Bachelor, formerly named Bachelor Butte, is a dormant stratovolcano atop a shield volcano in the Cascade Volcanic Arc and the Cascade Range of central Oregon. Named Mount Bachelor because it stands apart from the nearby Three Sisters, it ...

. The Six Lakes Trail crosses the mountain between Lucky Lake to the southeast and Senoj Lake to the northwest. Forest Road 46 (Lava Lake Road) is about east of the mountain.

References

{{reflist Mountains of Deschutes County, Oregon Mountains of Oregon Deschutes National Forest Volcanoes of Deschutes County, Oregon Pleistocene shield volcanoes Shield volcanoes of the United States Volcanoes of Oregon Volcanoes of the United States