Lace up for the Northwest Series - Day 3 WA, an engaging road race set for Monday, September 21, 2026, in scenic Clarkston, Washington. As part of the popular Mainly Marathons Northwest Series, this event offers a variety of distances, including a full marathon (26.2M), half marathon (13.1M), 10K, and 5K, catering to runners of all levels. Expect typical race day conditions in late September to be pleasant, with historical highs around 78°F and lows near 51°F, and a minimal 2% chance of precipitation.

The course promises a fast and flat experience, running along the picturesque Snake River and featuring gentle hills on a paved Greenbelt Walkway. Runners can anticipate beautiful river views as they complete an out-and-back loop, with marathoners tackling 12 laps and half marathoners 6 laps (subject to change). A standout feature is the "one giant aid station," powered by its own mobile kitchen, "The Looney Lunchbox," providing an impressive array of sustenance, from jelly beans and sandwiches to coffee and Gatorade.

This event is more than just a race; it's a celebration for a dedicated running community. All participants receive a T-shirt and other goods, and every finisher earns a separate medal for their daily achievement. Runners completing all races in the series are awarded a special medal, and those tackling their first full or half marathon also receive a unique medal. The final finisher of each marathon and half marathon is recognized with the cherished "caboose" award, fostering a uniquely supportive atmosphere for those who "run long and run often". The day concludes with a community celebration, complete with awards, wellness workshops, and recovery zones.