Mountain Lakes 100
Mountain Lakes 100 circles remote Oregon lakes and Cascade forest on a mountain course known for runnable trail and sustained nighttime miles.
Quick facts
- Dedicated Oregon 100-miler
- Olallie Lake and Cascade forest
- Remote mountain trail course
- Runnable trail with substantial accumulated climbing
About the Mountain Lakes 100
Mountain Lakes maintains a dedicated hundred-mile entry, route, crewing plan and result archive within Go Beyond Racing's portfolio.
Course
Singletrack and forest routes around Olallie Lake and Mount Hood country mix long runnable sections with substantial accumulated climbing.
Race-day weather
September may bring clear days and cold nights, while rain, wildfire smoke or early mountain snow remain meaningful risks.
Past Mountain Lakes 100 dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Saturday, September 19, 2026 | Results available | Open results |
| 2025 | — | Results available | Open results |
Mountain Lakes 100 FAQ
When is the Mountain Lakes 100?
We're waiting for the finalized date for the 2027 Mountain Lakes 100. The most recent running was on Saturday, September 19, 2026.
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