The Tunnel Light Marathon in mid-September is a point-to-point downhill marathon race on a scenic gravel rail-trail 50 miles east of Seattle, Washington. The course is a Boston qualifier (USATF certification number WA 08031 MW) and has the best profile in the country for a fast time due to the consistent gentle downhill grade and the low starting elevation. The first three miles are flat, cold, foggy and damp inside an unlit tunnel. Flashlights are strongly recommended. Once out of the Tunnel the gravel trail starts down the hill and keeps on going down, 2050 feet in the next 23 miles. It’s never steep enough to be uncomfortable; you just feel like you’re having a good day.