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Cascade Express Marathon

Sep 12, 2026
Snoqualmie Pass, WA
26.2M13.1M
Typical Weather
Snoqualmie Pass, WA · Sep 12
65°
High
49°
Low
20%
Precip

Based on data from station USC00451233 (16 mi away)

About This Race

Embark on an unforgettable running adventure at the Cascade Express Marathon and Half Marathon, set against the stunning backdrop of Snoqualmie Pass, WA, on September 12, 2026. Renowned as one of the nation's fastest courses, this point-to-point race offers participants a unique opportunity to chase personal bests and Boston Marathon qualifying times. The full marathon boasts a gentle, net downhill descent of nearly 1500 feet, while the half marathon features an 800-foot downhill gradient, both celebrated for their speed and scenic beauty.

The course, largely smooth packed gravel, guides runners through breathtaking vistas of the Cascade Mountains and along the serene Keechelus Lake. A highlight for both distances is the iconic 2.4-mile Snoqualmie Tunnel, an experience that requires a headlamp to navigate its cool, dark expanse. The marathon begins with a 5-mile out-and-back section near Hyak Trail Head before entering the tunnel, while half marathoners enter the tunnel early in their race. Aid stations, well-stocked with water and electrolyte drinks, are strategically placed every 2-3 miles, complemented by toilets at the start, finish, and along the course. Medical support and course marshals are also readily available to ensure a safe and supported journey.

Typical race day conditions in mid-September offer pleasant temperatures, with highs around 65F and lows around 49F, and only a 20% chance of precipitation, creating an ideal environment for a fast race. Finishers will be greeted with custom medals and ultra-soft tri-blend shirts to commemorate their achievement. Shuttles are provided to transport runners back to the start line from the various finish points. Join fellow runners for a truly distinctive and rewarding race experience through the majestic Cascade Mountains.