Camp Abbot was a military training center in the northwest United States, located in central Oregon south of Bend.

Active for less than sixteen months, the U.S. Army camp was used to train combat engineers during World War II and was named for Henry Larcom Abbot.

In 1855, Secretary of War Jefferson Davis dispatched an Army Corps of Topographical Engineers survey party to look for a railroad route from the Sacramento Valley in California to the Columbia River in the Oregon Territory.

[1][2] The Williamson-Abbot survey party included a geologist-botanist, a physician-naturalist, several assistant engineers, a computation specialist, a pack master, and eighteen mule packers.

He completed the survey of central Oregon, crossed the Cascade Mountains into the Willamette Valley, and then returned to Fort Reading, arriving in mid-November 1855.

On 4 December 1942, the War Department established a 5,500-acre (8.6 sq mi; 22 km2) combat engineer replacement and training center in central Oregon, along the Deschutes River south of Bend.

[4][7] In the years following the war, a portion of the camp property was returned to the U.S. Forest Service, but approximately 3,800 acres (6 sq mi; 15 km2) were sold as private land.

In 1993, Sunriver Resort completed a major renovation of the historic Great Hall, and it is now a modern facility with unique architectural character.

[8][9] The only other major Camp Abbot structure to survive for an extended period was the General Patch Bridge which was constructed in 1943 by Army engineers during the Oregon Maneuver.

Named for General Alexander M. Patch, who led it,[11] the maneuver involved over 100,000 army troops, many of them combat engineers based at Camp Abbot.