Light at the End of the Tunnel Marathon

The Light at the End of the Tunnel Marathon is a point-to-point downhill trail marathon that starts at Hyak Sno-Park near Snoqualmie Pass, Washington, and follows the historic Palouse to Cascades Trail (the old Milwaukee Road rail grade) on packed gravel with an average 2.2% decline. The signature feature is the Snoqualmie Tunnel, a headlamp-lit passage of more than two miles carved through the Cascades, followed by a scenic descent past waterfalls and old-growth forest. The course drops roughly 1,000 feet net and is USATF-certified, making the marathon a Boston Qualifier with no time penalty. Run by Team Tunnel since 2014, the race is one of three annual editions held on the same course (June, August, and September); this is the original spring edition. The 2026 running followed an alternate, fully permitted route after storm damage closed part of the traditional trail. Finishers are bussed back to Hyak, and a half marathon option shares the same tunnel start. The 2026 edition took place June 7; the next edition's date has not been announced yet.