Washington is a runner’s paradise, especially from late spring through early fall. With moderate temperatures, stunning scenery ranging from mountain views to coastal trails, and a vibrant running community, it’s the perfect place to tackle a half marathon this season. Whether you’re chasing a personal best or just want to soak in the beauty of the Pacific Northwest, these four races should be on your radar.
Snoqualmie Valley Half – June 20, 2026
Kick off summer with the Snoqualmie Valley Half in Carnation. This Runner Favorite (score: 81) takes you along the Snoqualmie Valley Trail, a scenic rail-trail that winds through farmland and forests. It’s a point-to-point course with a gentle downhill grade, making it a great option for a fast time or a smooth first half. Plus, the post-race festivities in Carnation are a fun way to celebrate.
Olympia Lakefair Races – July 18, 2026
Head to the state capital for the Olympia Lakefair Races, a midsummer highlight. This race offers a half marathon, 8K, and 3K, so it’s perfect for bringing along friends or family with different goals. The course loops around Capitol Lake and through downtown Olympia, offering water views and plenty of community energy. With a quality score of 76, it’s a solid pick that won’t disappoint.
Iron Horse Half Marathon – August 30, 2026
For a challenge with extraordinary views, the Iron Horse Half Marathon in North Bend is a must. Another Runner Favorite (81), this race runs along the John Wayne Pioneer Trail, with the highlight being the tunnel through the Cascades—bring a headlamp! The course is mostly gravel and slightly downhill, with mountain scenery that’s absolutely epic. Late August in Washington often brings perfect running weather.
Redmond Harvest Half Marathon – September 7, 2026
Close out the summer season on Labor Day with the Redmond Harvest Half Marathon. This race takes you through Redmond’s parks and trails, with a mix of paved paths and quiet roads. It’s a Standout (69) event known for its welcoming vibe and well-organized support. Plus, the finisher medal and harvest-themed goodies are a nice touch. A great way to transition into fall running.
Find Your Next Washington Half Marathon
These are just a few of the great events coming up in Washington. Whether you’re aiming for Mount Rainier views, a lakeside loop, or a fast rail-trail, the Evergreen State has a half marathon for you. Check out the full directory of half marathons in Washington to discover all upcoming races and start planning your next adventure.