Tunnel Light Marathon

North Bend, WA, USA · September 13, 2026
partly-cloudy-day55°·69° high·Light·Dry
9
Weather
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Course
Race Info
FAQ
History

Race Day Weather

partly-cloudy-day
55°at start
69° high
Light
Dry

Cool start, warming trend ahead

Runners will face a temperature rise from 52°F at the start to a peak of 69°F. Winds will be light, predominantly from the W, with gusts reaching 21 mph. With humidity at 61%, a conservative start is advised to manage the warming conditions effectively.

Race day forecast available in 48 days
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Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
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Race Info

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.

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Course Map

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FAQ

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When is the 2026 Tunnel Light Marathon?

The 2026 Tunnel Light Marathon will be held on Sunday September 13, 2026.

Is the Tunnel Light Marathon a Boston Marathon Qualifier?

Yes, the Tunnel Light Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 Tunnel Light Marathon?

The forecast calls for a high of 71°F and a low of 51°F with a 7% chance of rain.

Historical Weather

Based on 13 years of data
Avg Temp
69°F
L:57° H:69°
RunScore
8
Conditions
Rain Freq
46%
6 of 13 yrs
Wind8mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Tunnel Light Marathon

Partly cloudy throughout the day.

2025
cloudy
62°/68°-
8

2024 Tunnel Light Marathon

Partly cloudy throughout the day.

2024
partly-cloudy-day
61°/73°-
9

2023 Tunnel Light Marathon

Partly cloudy throughout the day.

2023
clear-day
58°/79°-
8

2022 Tunnel Light Marathon

Partly cloudy throughout the day.

2022
clear-day
57°/72°-
8

2021 Tunnel Light Marathon

Cloudy skies throughout the day with morning rain.

2021
rain
57°/64°Light
9

2019 Tunnel Light Marathon

Partly cloudy throughout the day with a chance of rain throughout the day.

2019
rain
59°/61°Light
8

2018 Tunnel Light Marathon

Partly cloudy throughout the day with rain clearing later.

2018
rain
55°/63°Light
7

2017 Tunnel Light Marathon

Partly cloudy throughout the day with rain.

2017
partly-cloudy-day
55°/65°Light
8

2016 Tunnel Light Marathon

Partly cloudy throughout the day.

2016
cloudy
55°/67°-
9

2015 Tunnel Light Marathon

Partly cloudy throughout the day with morning rain.

2015
cloudy
61°/66°Light
8

2014 Tunnel Light Marathon

Clear conditions throughout the day.

2014
clear-day
54°/83°-
8

2013 Tunnel Light Marathon

Cloudy skies throughout the day with rain.

2013
cloudy
59°/66°Light
8

2012 Tunnel Light Marathon

Clear conditions throughout the day.

2012
clear-day
53°/73°-
8

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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