Timberline Marathon
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Event details
The Timberline Marathon and Half Marathon will be held on June 6 and 7, 2026. Registration opens August 1, 2025. The event includes the following races:
- Marathon
- Half marathon
The event takes place in the Pacific Northwest near Timothy Lake, located at about 3,227 feet in the high Cascades.
Course and organization
The course circles Timothy Lake on single-track trails and begins at the Clackamas Lake Historic Ranger Station. The route crosses three rustic bridges over tributaries that feed the lake and offers views of Mt. Hood across the water. Cascadia Sports Timing, LLC operates the event under a special uses permit with the Mt. Hood National Forest and is an equal opportunity provider. Visit the organization's website for the most recent information.