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Half Marathon Calendar near Seattle 2025-2026

Explore the top half marathons near Seattle for 2025-2026! We've gathered 58 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
21
Sunday

Quilcene Oyster Races

5 km 10 km 13 mi
Sep
27
Saturday

Puyallup Valley Half Marathon

5 km 10 km 13 mi
Sep
27
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
October 2025
Oct
4
Saturday

Half Marathon at Langus Riverfront Park

5 km 10 km 15 km 13 mi
Oct
4
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Oct
5
Sunday

Poulsbo Half Marathon

10 km 13 mi
Oct
11
Saturday

Middle Fork Trail Run

Trail Run 10 km 13 mi 22 mi 50 km
Oct
12
Sunday

Snohomish River Run

5 km 10 km 13 mi 26 mi
Oct
18-21
Sa - Tu

Lake Washington Half Marathon

13 mi
Oct
18
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
November 2025
Nov
1
Saturday

Half Marathon at Langus Riverfront Park

5 km 10 km 15 km 13 mi
Nov
1
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Nov
8
Saturday

Grand Ridge Trail Run

Trail Run 5 mi 13 mi 26 mi 50 km
Nov
9
Sunday

Run the Bay

5 km 10 km 13 mi
Nov
15
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Nov
29
Saturday

Seattle Ghost Marathon

13 mi 26 mi 50 km
Nov
29
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Nov
30
Sunday

Seattle Marathon

13 mi 26 mi
December 2025
Dec
6
Saturday

Half Marathon at Langus Riverfront Park

5 km 10 km 15 km 13 mi
Dec
13
Saturday

Pigtails Run

Trail Run 13 mi 26 mi 50 km
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