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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.

February 2026
Feb
7
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Feb
7
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Feb
8
Su

My Better Half Marathon
5 km 10 km Half Marathon
Feb
8
Su

West Seattle Beach Run - Fat Ass
Trail Run Half Marathon Marathon 50 km
Feb
14
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Feb
14
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Feb
21
Sa

US Road Running - Everett
3 mi 6 mi 13 mi
March 2026
Mar
7
Sa

Lake Sammamish Half Marathon
Half Marathon
Mar
7
Sa

US Road Running - Everett
5 km 10 km 13 mi 26 mi
Mar
7
Sa

The Best Races - South Lake Union
5 km 10 km 13 mi
Mar
8
Su

The Kirk-Wood Half Marathon
Half Marathon
Mar
14
Sa

St. Paddy's Day Run Tacoma
5 km 10 km Half Marathon
Mar
14
Sa

The Best Races - Seattle
5 km 10 km 13 mi
Mar
14
Sa

Run The Green
10 km Half Marathon
Mar
14
Sa

US Road Running - Everett
5 km 10 km Half Marathon
Mar
14
Sa

Pie High Trail Run
Trail Run 5 km 10 km Half Marathon
Mar
21
Sa

Dash Point Trail Run
Trail Run 10 km 13 mi
Mar
21
Sa

US Road Running - Everett
5 km 10 km 13 mi 26 mi
Mar
28
Sa

Spring Run for Fun @ Bridle Trails
Trail Run 5 km 10 km Half Marathon Marathon
Mar
29
Su

Mill Town Half Marathon
3 mi 6 mi 13 mi