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Half Marathon Calendar near Mercer Island 2026-2027

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Explore the top half marathons near Mercer Island for 2026-2027! We've gathered 58 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathon Calendar United States
August 2026
Aug
29
Sa

Tacoma Narrows Half Marathon

5 km 10 km 13 mi
Aug
29
Sa

The Best Races - Seattle

5 km 10 km 13 mi
The Best Races - Seattle
Aug
29
Sa

Seattle Sunrise Wish Run

5 km 10 km Half Marathon 50 km
Aug
30
Su

Iron Horse Half Marathon

13 mi
September 2026
Sep
5
Sa

US Road Running - Everett

5 km 10 km 13 mi 26 mi
Monthly updates for Mercer Island

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Sep
7
Mo

Redmond Harvest Half Marathon

13 mi
Sep
12
Sa

Cascade Express Marathon

Trail Run 13 mi 26 mi
Sep
12
Sa

Beat the Blerch

Trail Run 3 mi 10 km 13 mi 26 mi
Sep
12
Sa

The Best Races - Seattle

5 km 10 km 13 mi
The Best Races - Seattle
Sep
12
Sa

Fastest of the Fastest Half 13.1

5 km 10 km 13 mi
Sep
13
Su

Tunnel Light Marathon

Trail Run 13 mi 26 mi
Sep
13
Su

Race for a Soldier

3 mi 6 mi Half Marathon
Sep
19-20
Sa - Su

Seattle North Spartan North American Championship Weekend

Obstacle Run 5 km 10 km Half Marathon
Sep
19-20
Sa - Su

Orca Half Marathon

8 mi Half Marathon
Sep
19
Sa

Mud Mountain Dam Marathon

13 mi 26 mi
Sep
26
Sa

The Best Races - Seattle

5 km 10 km 13 mi
The Best Races - Seattle
October 2026
Oct
3
Sa

Run for the Gnomes Half Marathon

5 km 13 mi
Oct
3
Sa

US Road Running - Everett

5 km 10 km 13 mi 26 mi
Oct
4
Su

Poulsbo Half Marathon

10 km 13 mi
Oct
10
Sa

US Road Running - Lake Stickney

5 km 10 km 13 mi
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