Lace up for an unforgettable experience at the Northwest Series - Day 4 WA, hitting the scenic Greenbelt Walkway in Clarkston, WA, on September 22, 2026. This event, proudly part of the acclaimed Mainly Marathons Northwest Series, offers a variety of distances to challenge every runner, including a 26.2M Marathon, 13.1M Half Marathon, 10K, and 5K. The course itself is a runner's delight: a fast and flat paved out-and-back route that provides picturesque river views along the Snake River, with gentle hills to keep things engaging. Marathons involve 12 laps, while half marathons cover 6 laps of this inviting 2.2-mile stretch.

Known for its "loony, yet absolutely fabulous community," this series welcomes all paces with its famously generous no-time-limit policy, encouraging every participant to achieve their goals. Runners can expect outstanding support with a giant aid station featuring "The Looney Lunchbox," offering an array of treats from jelly beans to sandwiches, alongside coffee and Gatorade. Beyond the excellent course and support, what truly sets this race apart are the unique accolades: finishers in distances longer than a half marathon earn a custom metal-stamped nameplate, and individual medals are awarded for each day of the series, with a special medal for those completing the entire challenge.

Anticipate ideal running conditions with typical race day highs around 77°F and lows near 50°F, coupled with a minimal 2% chance of precipitation. The Northwest Series - Day 4 WA promises not just a race, but a rewarding journey filled with camaraderie, scenic beauty, and unique recognition for your accomplishments, culminating in a festive atmosphere that includes wellness workshops and recovery zones.