Washington Half Marathon Calendar 2025-2026

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Explore the best half marathons in Washington for 2025-2026! Our updated list features 123 exciting races across the region. Find your next race in Washington below and join the running community at these great events!

September 2025
Sep
27
Saturday

Fidalgo Trail Run

Trail Run 5 mi 13 mi 26 mi
Sep
27
Saturday

Half Marathon at Liberty Park

5 km 10 km 15 km 13 mi
October 2025
Oct
4
Saturday

Leavenworth Marathon

13 mi 26 mi
Oct
4
Saturday

Half Marathon at Langus Riverfront Park

13 mi
Oct
5
Sunday

Poulsbo Half Marathon

10 km 13 mi
Oct
12
Sunday

Snohomish River Run

5 km 10 km 13 mi 26 mi
Oct
12
Sunday

Girlfriends Run

6 km 10 km 13 mi
Oct
18-21
Sa - Tu

Lake Washington Half Marathon

13 mi
Oct
18
Saturday

Half Marathon at Chiawana Park

5 km 10 km 15 km 13 mi
Oct
25
Saturday

Half Marathon at Liberty Park

5 km 10 km 15 km 13 mi
Oct
25
Saturday

Chamna Chase

Trail Run 6 km 10 km 13 mi
Oct
26
Sunday

Tri-Cities Marathon

13 mi 26 mi
November 2025
Nov
1
Saturday

Half Marathon at Langus Riverfront Park

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

Half Marathon at Chiawana Park

5 km 10 km 15 km 13 mi
Nov
22
Saturday

Half Marathon at Liberty Park

5 km 10 km 15 km 13 mi
Nov
29
Saturday

Seattle Ghost Marathon

13 mi 26 mi 50 km
Nov
30
Sunday

Seattle Marathon

13 mi 26 mi
December 2025
Dec
6
Saturday

Half Marathon at Langus Riverfront Park

13 mi
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