The Chuckanut Mountain 50K Trail Run, set for March 21, 2026, in Fairhaven, WA, is a legendary Pacific Northwest classic known for blending runnable trails with rugged mountain challenges. This prestigious ultramarathon, with a 50K distance, invites runners to experience an exhilarating course that promises breathtaking scenery and a true test of grit. Starting and finishing at Fairhaven Park, the race utilizes a lollipop-shaped course. The first and last 10K segments offer smooth, relatively flat running along the scenic Interurban Trail adjacent to Chuckanut Bay.

The heart of the challenge lies in the middle 30K, where runners ascend, traverse, and descend the famous Chuckanut Mountain Ridge within Larrabee State Park. This section boasts a significant elevation gain of 5,000 to 5,400 feet (1,645 meters) and features technical terrain, including roots, rocks, and potentially muddy conditions. Notable climbs, such as the infamous "Chinscraper," demand focus and determination, while the rewards include sweeping views over Bellingham Bay and the San Juan Islands. Runners consistently praise the stunning natural beauty, with mossy singletrack, lush forests, and even waterfalls along the route.

The Chuckanut 50K, founded in 1993, has evolved from an informal training run into one of the largest and most competitive trail races in the U.S., often selling out quickly. Despite its demanding nature, it's considered approachable for both seasoned ultrarunners and those tackling their first 50K. Five well-stocked aid stations, manned by enthusiastic and knowledgeable volunteers, offer standard fare along with unique surprises to keep spirits high. Typical race day conditions in late March include highs around 55F and lows around 39F, with an 18% chance of precipitation. With an 8-hour time limit, the Chuckanut 50K is more than a race; it's a celebrated community event that embodies the adventurous spirit of the Pacific Northwest trail running scene.