Tunnel Light Marathon & Half Marathon

Tunnel Light Marathon & Half Marathon - September 13, 2026

The Tunnel Marathons deliver one of the fastest marathon & half marathon experiences in the country. With a steady downhill grade and low starting elevation, this course is engineered for speed — an ideal opportunity to set a Personal Record, earn a Boston Qualification (marathon), or run your first race. From the moment you enter the historic Snoqualmie Tunnel to the final miles surrounded by mountain views, waterfalls, and crisp Washington air, the Tunnel Marathons are as breathtaking as they are fast.

2026 Course Update: Due to severe storm damage, the 2026 event will follow an alternate, fully permitted route. The 2026 course will remain fast and scenic, featuring approximately 1,000 feet of net elevation drop (marathon & Half). Both races will be USATF-certified, and the marathon is a Boston Qualifier (certification finalized after snowmelt in May). While the finish differs from the traditional course, the spirit of the Tunnel Marathons remains unchanged — a smooth downhill rail trail, stunning Pacific Northwest scenery, and the unforgettable run through the Snoqualmie Tunnel.

A Proven Boston Qualifier (Marathon): The original marathon course ranked in the Top 10 nationwide for Boston Qualifiers and has helped more than 42% of participants earn a BQ. In 2026, expect the same professional organization, safety standards, and fast course design that define the Tunnel experience.

Built for Speed: Approximately 1,000 feet of net downhill. Smooth, packed gravel surface (road or light trail shoes work well).

Registration Includes: Professional chip timing, custom race bib, finisher’s shirt and medal, post-race food and festivities, shuttle transportation back to Hyak Sno-Park.

What to Know: Headlamps are required for the Snoqualmie Tunnel. Course surface is packed gravel. Aid stations every 2–3 miles with water, electrolytes, first aid, and Honey Stinger gels at select locations.

Races Offered:
- Light at the End of the Tunnel Marathon & Half – June 7, 2026
- Tunnel Vision Marathon & Half – August 9, 2026
- Tunnel Light Marathon & Half – September 13, 2026

Start Times:

• Marathon: 8:00 AM
• Tunnel Light Half Marathon: 8:30 AM