The 2026 Girdwood Half Marathon has concluded.

Girdwood Half Marathon

Race complete
Girdwood, AK, USA · October 3, 2026·
cloudy32°·35° high·Light·Dry
10
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Girdwood Half Marathon race day weather

cloudy
32°at start
42° high
Breezy
Dry
Your goal
0:00:00

Cold start — layer up, warming through the race

Runners will start in chilly 32°F conditions — dress in layers for the corral and plan to shed early. Temperatures rising to 42°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 67% is worth noting for effort level, especially in later miles.

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About the Girdwood Half Marathon

The Girdwood Marathon's half marathon covers 13.1 miles of Girdwood's trail system and starts and finishes at the Alyeska Daylodge. The route links the Alyeska Bike Path, the National Historic Iditarod Trail, the Bird-to-Gird Pathway, Beaver Pond Trail, California Creek Trail and Athabascan Trail through temperate rainforest. It finishes with a climb up the Chair 7 road and a descent down the Chair 3 road at Alyeska Resort. It runs on the Saturday of race weekend, and October conditions on these trails are usually wet.

Race weekend

Saturday, October 3
9:00 AMMarathon (26.2 mi)
10:00 AMHalf Marathon (13.1 mi)
10:30 AM5K (3.1 mi)
Area Map
Course Map

Girdwood Half Marathon FAQ

When is the 2026 Girdwood Half Marathon?

The 2026 Girdwood Half Marathon will be held on Saturday October 3, 2026.

What will the weather be like for the 2026 Girdwood Half Marathon?

The forecast calls for a high of 42°F and a low of 28°F with a 0% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Girdwood Half Marathon?

Over the 8 years racecast.io has race-day weather for (2019 to 2026), it averaged 42°F at the start and 44°F by a typical finish. Rain fell during race hours in 3 of those years (2020, 2021 and 2025).

What was the hottest Girdwood Half Marathon?

Of the 8 years on record, 2025 was the warmest, reaching 51°F during race hours. The coldest start was 2026, at 32°F.

What was the windiest Girdwood Half Marathon?

Of the 8 years on record, 2020 was the windiest, with wind averaging 14 mph during race hours. The calmest was 2024, at 4 mph.

Girdwood Half Marathon weather history

Based on 8 years of data
Avg Temp
43°F
L:42° H:44°
RunScore
10
Conditions
Rain Freq
38%
3 of 8 yrs
Wind7mph
Dew36°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
32°/35°-
10
2025
cloudy
50°/51°Light
10
2024
partly-cloudy-day
43°/45°-
10
2023
cloudy
40°/41°-
10
2022
cloudy
44°/48°-
10
2021
rain
34°/36°Light
10
2020
cloudy
49°/51°Light
10
2019
partly-cloudy-day
41°/45°-
10