Lewis-Clark Half Marathon
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Lewis-Clark Half Marathon and 5K at Granite Lake Park
The Seaport Striders Running Club holds the 28th annual Lewis-Clark Half Marathon, 5K, and Kids' Run on October 17, 2026 at Granite Lake Park, 845 Port Way, Clarkston, WA. The event includes a half marathon, a 5K, and a free one-mile Kids' Run.
Both the half-marathon and 5K use out-and-back routes along the Snake River on the Greenbelt Trail System. The course is on a paved trail and is described as mostly flat, with multiple water and bathroom stops available. Race awards include top-three male and female prizes, age-group ribbons, and medals for half marathon finishers.
Registration fees vary by registration date: pre-registration by October 4 is $15 run only or $33 with a shirt; fees after October 4 are $20 run only or $38 with a shirt. Registration by October 4 is required to guarantee a shirt. Seaport Striders club members receive a $2 discount. Mail entries are accepted payable to Seaport Striders, P.O. Box 20, Lewiston, ID 83501. No refunds.
The Kids' Run is free and one mile in length. Children receive bibs and a participation recognition; finishing times for the Kids' Run are announced as participants finish but are not reported publicly. Visit the organization's website for the most recent information.
