The 1st Song Sparrow Bridge 10K and 4 Mile Run, Walk at Northern State in Sedro-Woolley 2027

Woolley Trail Runs is a February trail race held at Township and Polte Road in Sedro-Woolley, Washington, offering 13.1-mile, 26.2-mile, and 50K distances. It is an NW Ultra event, with a low-key setup: no prize money, limited aid, and a clear instruction for runners to carry their own water and food. All three distances follow out-and-back routes on a gravel railroad-grade path, with approximately 90 percent of the course on unpaved trail. The outbound leg features a gentle ascent, with the return trip mirroring this grade. Road crossings are present and unmonitored, requiring runners to manage traffic themselves. Turnarounds and any trail diversions are marked, with aid stations located at mile 4 and at the turnaround points. The course is not USATF certified, thus not qualifying for Boston, though organizers state it meets the advertised distance. The race, established in 2010, maintains a modest entry fee relative to many trail ultras.