The 2026 Tunnel Light Half Marathon has concluded.Share your finish

Tunnel Light Half Marathon

Race complete
North Bend, WA, USA · September 13, 2026·
rain42°·43° high·Light·Rain likely
9
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Tunnel Light Half Marathon race day weather

rain
42°at start
46° high
Light
Rain likely
Your goal
0:00:00

Cool start — fast day potential, rain likely

A cool 42°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Light winds shouldn't be a major factor for pacing. Rain is likely — waterproof your phone and bib, and consider a disposable poncho for the corral. High humidity (99%) will make it harder to cool down through sweat — increase fluid intake accordingly.

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cloudy10
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About the Tunnel Light Half Marathon

The Tunnel Light Half Marathon is a point-to-point run that starts at Hyak Sno-Park near Snoqualmie Pass and passes through the Snoqualmie Tunnel, a dark stretch of more than two miles on the old railway bed. After the tunnel the course descends along the Palouse to Cascades Trail through evergreen forest, past the Humpback, Bandera and Rock Creek areas, to the finish at Garcia Trailhead. The surface is smooth packed gravel, and a headlamp is needed for the unlit tunnel. Runners walk about a mile down Forest Service Road 9020 after the finish to the shuttle buses back to Hyak.

Race weekend

Sunday, September 13
8:00 AMMarathon (26.2 mi)
8:30 AMHalf Marathon (13.1 mi)

Tunnel Light Half Marathon FAQ

When is the 2026 Tunnel Light Half Marathon?

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

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

The forecast calls for a high of 48°F and a low of 42°F with a 100% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Tunnel Light Half Marathon?

Over the 14 years racecast.io has race-day weather for (2012 to 2026), it averaged 52°F at the start and 57°F by a typical finish. Rain fell during race hours in 6 of those years.

What was the hottest Tunnel Light Half Marathon?

Of the 14 years on record, 2023 was the warmest, reaching 69°F during race hours. The coldest start was 2026, at 42°F.

What was the windiest Tunnel Light Half Marathon?

Of the 14 years on record, 2018 was the windiest, with wind averaging 8 mph during race hours. The calmest was 2017, at 1 mph.

Tunnel Light Half Marathon weather history

Based on 14 years of data
Avg Temp
54°F
L:52° H:57°
RunScore
8
Conditions
Rain Freq
43%
6 of 14 yrs
Wind4mph
Dew47°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
rain
42°/43°Light
9
2025
partly-cloudy-day
50°/50°-
10
2024
clear-day
57°/59°-
7
2023
partly-cloudy-day
58°/69°-
7
2022
clear-day
47°/54°-
10
2021
cloudy
51°/52°Light
10
2019
cloudy
48°/60°Light
9
2018
rain
55°/56°Light
8
2017
partly-cloudy-day
48°/55°-
10
2016
cloudy
45°/46°-
10
2015
cloudy
60°/61°Light
6
2014
clear-day
54°/64°-
8
2013
clear-day
65°/69°Light
6
2012
partly-cloudy-day
52°/61°-
8