Race Day Weather
Warm afternoon, moderate humidity
Runners will face a temperature increase from 58°F at the start to 71°F by the finish, with average humidity at 65%. Winds will be light from the SW at 7 mph, with gusts up to 22 mph. Runners should consider adjusting their pace as the day warms and stay hydrated throughout the event.
Pace Calculator
The Tunnel Light Marathon offers runners a thrilling point-to-point course from Snoqualmie Pass to North Bend, Washington, featuring a 2.4-mile unlit tunnel that requires headlamps. With a net elevation loss of over 2,000 feet and a consistent 2.2% downhill grade, this USATF-certified marathon is renowned for facilitating personal records and Boston Marathon qualifications. The route showcases the stunning Pacific Northwest scenery, including mountain and waterfall views, as it winds through lush forests on a smooth, packed gravel trail. Source
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 |  | 62°/68° | - | 54° | |
2024 | | 61°/73° | - | 59° | |
2023 |  | 58°/79° | - | 53° | |
2022 | | 57°/72° | - | 47° | |
2021 |  | 57°/64° | Light | 54° | |
2019 | | 59°/61° | Light | 56° | |
2018 | | 55°/63° | Light | 50° | |
2017 | | 55°/65° | Light | 51° | |
2016 | | 55°/67° | - | 53° | |
2015 | | 61°/66° | Light | 55° | |
2014 | | 54°/83° | - | 47° | |
2013 | | 59°/66° | Light | 59° | |
2012 | | 53°/73° | - | 52° |