South Lake Union close

Half Marathon Calendar near South Lake Union 2025-2026

Explore the top half marathons near South Lake Union for 2025-2026! We've gathered 80 exciting races in the area. Check out our detailed list below to find your next local race.

November 2025
Nov
28
Fr

Grateful Runners Turkeys Revenge
Half Marathon Marathon 50 km
Nov
29
Sa

Seattle Ghost Marathon
Half Marathon Marathon 50 km
Nov
29
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Nov
30
Su

Seattle Marathon
Half Marathon Marathon
December 2025
Dec
6
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Dec
6
Sa

Redmond Reindeer Romp
Trail Run 5 mi 13 mi
Dec
13
Sa

Pigtails Run
Trail Run Half Marathon Marathon 50 km
Dec
13
Sa

Santa Runs Tacoma
5 km 10 km Half Marathon
Dec
13
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Dec
13
Sa

US Road Running - Everett
5 km 10 km 13 mi
Dec
20
Sa

Santa Bear Half
5 km 10 km 13 mi
Dec
27
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Dec
27
Sa

Lake Sammamish Classic 13.1
13 mi
January 2026
Jan
3
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Jan
3
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Jan
10
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Jan
17
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Jan
17
Sa

Frost Eagle Trail Run
Trail Run 5 mi 13 mi
Jan
17
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Jan
18
Su

Birthday Run - Seattle
13 mi 26 mi