Lace up for an unparalleled downhill experience at the Tunnel Light Marathon & Half Marathon on September 13, 2026, setting off from North Bend, WA. This highly-regarded event is celebrated for one of the nation's fastest courses, making it a prime target for runners chasing a personal record or a coveted Boston Marathon qualifying time. The original marathon course famously begins at Hyak, propelling runners through a unique 2.4-mile unlit tunnel that demands a headlamp, before descending over 2,000 feet on a consistent 2.2% grade along packed gravel trails. As you emerge from the tunnel's darkness, you're greeted by breathtaking Pacific Northwest scenery, featuring lush forests, cascading waterfalls, and picturesque mountain vistas, a beautiful setting for a fast run. The half marathon distance, beginning halfway through the full course, offers a similar fast, scenic, and downhill profile, though it bypasses the iconic tunnel.

Runners consistently praise the race for its efficient organization and the rewarding challenge it presents. Aid stations are strategically placed approximately every 2-3 miles, offering water, electrolytes, and gels to keep you fueled, with restrooms available at key points along the course. Typical race day conditions in mid-September bring comfortable highs around 65°F and lows near 49°F, with a modest 20% chance of precipitation, creating ideal running weather. However, for 2026, due to severe storm damage, the original course will not be used. Race organizers are diligently working with agencies to establish an alternative route, with updates and registration details expected by February 1, 2026, ensuring a safe, scenic, and memorable race experience continues.