Jack & Jill’s Downhill Marathon features a fast and gentle downhill course along one of Washington’s most scenic trails near North Bend, east of Seattle. Runners experience a stunning backdrop after passing through the Snoqualmie Tunnel and continue through a gradual descent on a hard-packed, shaded dirt and gravel road. This scenic marathon is known for its potential to qualify for Boston and setting personal records, offering participants a breathtakingly beautiful journey. The course’s strategic design makes it one of the world’s fastest, ensuring a memorable running experience for endurance enthusiasts.