Mt. Si Relay & Trail Runs
Snoqualmie, Washington, United States
May, 2027 (TBD)
50k, 50mi, Half-marathon, Marathon, Ultra, Relay
Race Information
The Mt. Si Trail Races began as the “Falls to Gasworks Relay” in 1983, beginning at Mt. Si High School near Snoqualmie Falls and ending at Gasworks Park in Seattle.
Today, the half marathon, marathon, 50K, 50M, and relay are run on the scenic Snoqualmie Valley Trail, with the marathon, 50K, and 50M continuing to run east on the Palouse to Cascades Trail. The trail is old, railroad-grade, with a gentle climb from North Bend to Rattlesnake Lake.
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Race Facts
Race Size: 500 - 1,000
Elevation: Fast and Flat
Course Type: Trail
Boston Qualifier: No
Kids Run: No
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