One of the Nation's fastest courses...

The Tunnel Marathons offer one of the fastest courses in the country. This point to point course delivers excellent times thanks to a consistent gentle downhill grade and low starting elevation. It is the perfect race to set a PR and snag a BQ.

Run through a dark tunnel lit by your best running mates, gawk at the mountains and waterfalls, take in the sweet Washington air and let your legs go. The speed of the course comes from a loss of just over 2,000' of elevation at a consistent grade.

The Tunnel course is in the top 10 for a BQ per Runners World and Race Raves! This USATF Boston Certified course (WA 08031 MW) has helped over 30% of our runners snag a BQ on the ORIGINAL Tunnel course. Founded by Washington residents and offered since 2007, you can be sure you’re in good hands. It's been a favorite among racers and why runners continue to come back for more!


Key Course Locations


RAce Start

The race starts at the Hyak trailhead on the John Wayne Pioneer trail just east of Snoqualmie Pass. After a half mile runners enter the pitch black tunnel for 2.4 miles. A light source such as a headlamp is strongly recommended. Once you get about 50 yards into the tunnel, you can see a pinpoint of light ahead of you which is the "Light at the End of the Tunnel" over 2 miles away.


Race Finish

Runners continue traversing 5 more miles through forested slopes to the Iron Horse State Park trailhead at Rattlesnake Lake. The course continues on the Snoqualmie Valley trail a through leafy second-growth forest. The race finishes at a gravel parking area along North Bend Way 2.4 miles SE of downtown North Bend.

Course Support

The Tunnel Marathons utilize a unique and fast downhill trail course with limited access to roads along the course. You may want to carry a small water bottle, particularly if the weather is warm. We suggest you carry a cell phone. Any runner receiving support from non-official staff will be disqualified due to USATF rules. For example, a friend on a bike handing out water or gels, NO EXCEPTIONS.

There are ten aid stations along the course, situated at roughly 2.5 mile intervals. Water and Gatorade are provided at all aid stations and Clif Shot Energy Gel (Caffeinated and non) at the designated aid stations. Wastebaskets are provided at and shortly after each aid station for cups and other litter. First aid supplies, provided at some of the aid stations, include Vaseline, Band aids, salt caps, sun screen, hand sanitizer and bug spray.

Aid Station Names and Locations

2.6   Tunnel Exit: water, electrolyte drink, first aid
5.3   Humpback: water, electrolyte drink, first aid
8.0    Bandera: water, electrolyte drink, gels, first aid
10.7  Rock Creek: water, electrolyte drink, first aid
13.4  Garcia: Water, water, electrolyte drink, first aid
16.4  Twin Falls: water, electrolyte drink, gels, first aid
18.8  Cedar Butte: water, electrolyte drink, first aid
21.2  Rattlesnake: water, electrolyte drink, gels, first aid
22.8  Edgwick 1: water, electrolyte drink, first aid
24.8  Edgwick 2: water, electrolyte drink, first aid

In addition to the aid stations, we will have Search and Rescue out on the course and a medical team at the finish.

There are porta-potties and restrooms at the start and porta-potties at the finish. Along the course there are restrooms at miles 3, 8.7, 11.6 and at mile 21.2