In 46 days · Sun, Nov 29, 2026
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Sunday, November 29th, 2026
5th Ave & Harrison St., Seattle WA
Half · Marathon
40–48°F · rain likely
See last 10 years
On this date: rain 1 of the last 10 years
2025
41–47°F
dry
2024
38–43°F
dry
2023
31–42°F
dry
2022
30–38°F
rain
2021
52–57°F
dry
2020
35–48°F
dry
2019
28–41°F
dry
2018
43–50°F
dry
2017
41–50°F
dry
2016
40–48°F
dry
Best months to race in Washington →
Race-day forecast says layers
40°F at the start.
Gloves, ear warmers, throwaway layers, hand warmers — delivered before race day.
About this race
SUNDAY, NOVEMBER 29, 2026
The UW Medicine Seattle Marathon and Half Marathon, Seattle's original hometown marathon and the oldest marathon in the Pacific Northwest, is set on a beautiful course with rolling hills and scenic views of Seattle’s iconic bridges, waterways and architecture. Take part in this iconic Thanksgiving weekend tradition and see why we've been RUNNING SEATTLE SINCE 1970.
Updated course maps and certifications are on the way...
Course map
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Run clubs near Seattle to train with before race day.
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