Lewis-Clark Half Marathon
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About the race
The Seaport Striders Running Club presents the 28th annual Lewis-Clark Half Marathon and 5K at Granite Lake Park on October 17, 2026. The event includes a kids run and multiple race distances held at the park located at 845 Port Way, Clarkston, WA.
Distances:
- Half marathon
- 5K
- Kids 1 mile free participation
Both the half marathon and 5K are out-and-back courses along the Snake River on the Greenbelt Trail System. The trail is paved and mostly flat, with multiple water and bathroom stops available. Awards include top three male and female overall plus age group ribbons, and medals for half marathon finishers.
Registration options include pre-registration, mail-in entry, and same-day check-in at Granite Lake Park. Pre-registration by October 4 is required to receive a shirt; pre-registered fees are $15 for the run only or $33 with a shirt, and fees after October 4 are $20 for the run. Seaport Striders club members receive a $2 discount. Mail-in entries may be sent to Seaport Striders, P.O. Box 20, Lewiston, ID 83501. No refunds are offered.
The free Kids 1 mile event issues bibs and a participation recognition; finish times for children are announced at the event but are not posted online. Visit the organization's website for the most recent information.