McDonald Forest 50K Trail Run

The McDonald Forest 50K is one of Oregon's oldest and most beloved ultramarathons, winding through the singletrack trails and logging roads of OSU's McDonald Forest just north of Corvallis. The course starts and finishes at the historic Forestry Cabin in Peavy Arboretum, climbing through the forested hills to McCulloch Peak—the highest point in the forest at 2,133 feet—before returning through a series of named trails known for their smooth, pine needle-cushioned surfaces. With 21+ miles of maintained singletrack and 10+ miles of scenic logging roads, runners experience the full character of this beloved community forest across 6,500 feet of cumulative gain. Five aid stations and crew access at Lewisburg Saddle provide ample support throughout the loop. Organized by Corvallis Area Trail Runners, a 501(c)(3) nonprofit, all proceeds support local high school cross-country teams, the Corvallis Mountain Rescue Unit, and OSU Research Forest.