Girdwood Marathon
Race Day Weather
Cool start — fast day potential, rain likely
A cool 41°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 (85%) will make it harder to cool down through sweat — increase fluid intake accordingly.
Pace Calculator
Get forecast alerts for Girdwood Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Girdwood Marathon is a trail marathon through the Girdwood Valley near Alaska's Alyeska Resort. It starts and finishes at the Alyeska Daylodge and links more than a dozen singletrack trails, including Winner Creek, the Iditarod Trail, and Bird-to-Gird, through temperate rainforest with a hand-tram river crossing along the way. It has run each October since at least 2019 as a fundraiser for the Girdwood Nordic Ski Club. Organizers warn it is not a beginner course: miles 22 to 24 are notoriously tough, and race day is usually wet.
