There's something special about running a half marathon in Washington. From the evergreen tunnels of the Pacific Northwest to the wide-open skies of the Inland Empire, the state offers a backdrop that makes every mile feel like an adventure. Whether you're chasing a personal best or just looking for an excuse to explore a new corner of the state, this summer and fall lineup has you covered. Here are four standout races worth adding to your calendar.
Iron Horse Half Marathon – August 30, 2026 in North Bend
Kicking off the late-summer season, the Iron Horse Half Marathon is a Runner Favorite (score 81) that takes runners along the historic John Wayne Pioneer Trail. The crushed-gravel surface is gentle on the legs, and the route follows the scenic Snoqualmie Valley with mountain views that make the miles fly by. It's an out-and-back on a gentle rail-trail grade—perfect for runners who want a fast, scenic day without a lot of elevation gain. Plus, North Bend is just 30 minutes east of Seattle, making it an easy getaway.
The Brooks Orca Half Marathon presented by REI – September 19, 2026 in Seattle
If you want a city race that captures the spirit of the Pacific Northwest, look no further than The Brooks Orca Half Marathon presented by REI (Standout, score 77). Starting and finishing at Seward Park, the course winds through Seattle's lakefront neighborhoods, along the I-90 trail, and past iconic views of Lake Washington and Mount Rainier. The late-September timing usually brings crisp, ideal running weather. And with Brooks and REI as partners, you know the swag and finish-line experience will be top-notch.
Olympia Lakefair Races - Half Marathon, 8K & 3K – July 18, 2026 in Olympia
Summer racing doesn't get more festive than the Olympia Lakefair Races - Half Marathon, 8K & 3K (Standout, score 76). Held in conjunction with the city's Lakefair celebration, the half marathon course takes you around Capitol Lake and through the tree-lined streets of Olympia. It's a flat, fast route—ideal for a first-time half or a PR attempt. After you cross the line, the Lakefair carnival is waiting, complete with food vendors, live music, and a small-town vibe that makes the whole morning feel like a block party.
Colbert Autumn Classic Half Marathon & 4-Mile Loop – September 26, 2026 in Colbert
Just north of Spokane, the Colbert Autumn Classic Half Marathon & 4-Mile Loop (Solid Pick, score 72) offers a quiet, rural alternative to big-city races. The course runs on country roads through farmland and pine forests, with the colors of early autumn adding a golden glow. It's a stripped-down, no-frills race that focuses on what matters: a beautiful route, friendly volunteers, and a welcoming community. If you're looking for a peaceful end-of-season run, this is it.
Find Your Next Washington Half Marathon
These four races are just a taste of what Washington has to offer. Whether you're drawn to the mountains, the city, or the countryside, there's a half marathon here waiting for you. Ready to plan your next adventure? Check out our full list of half marathons in Washington and find the race that fits your goals and schedule.