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Half Marathon Calendar near SeaTac 2026-2027

Monthly updates for SeaTac

Get new running races (and updates) in your inbox every month.

Explore the top half marathons near SeaTac for 2026-2027! We've gathered 57 exciting races in the area. Check out our detailed list below to find your next local race.

May 2026
May
2-3
Sa - Su

Tacoma City Marathon

5 km 10 km Half Marathon Marathon
May
3
Su

Kirkland Half Marathon

5 km Half Marathon
May
8-9
Fr - Sa

Tiger Claw

Trail Run 3 mi 11 mi ... 50 km 50 mi
May
9
Sa

Pigtails Run

Trail Run Half Marathon Marathon 50 km
May
16
Sa

Soaring Eagle Trail Run

Trail Run 5 km 10 km Half Marathon
May
23
Sa

The Best Races - Seattle

5 km 10 km 13 mi
May
30
Sa

Mud Mountain Dam Marathon

13 mi 26 mi
June 2026
Jun
6
Sa

The Best Races - Seattle

5 km 10 km 13 mi
Jun
6
Sa

Green River Marathon

Trail Run 13 mi 26 mi 50 km
Jun
7
Su

The Great Ferry Race

Half Marathon
Jun
7
Su

Light at the End of the Tunnel Marathon

Trail Run 13 mi 26 mi
Jun
20
Sa

Tiger Peak Challenge

Trail Run 5 mi 13 mi 50 km
Jun
20
Sa

The Best Races - Seattle

5 km 10 km 13 mi
Jun
20
Sa

Snoqualmie Valley Half Marathon

10 km Half Marathon
Jun
27
Sa

Seattle Half Marathon

5 km 10 km 15 km Half Marathon
July 2026
Jul
3
Fr

Popsicle Run

Trail Run Half Marathon Marathon 50 km
Jul
4
Sa

The Best Races - Seattle

5 km 10 km Half Marathon
Jul
18
Sa

Mount Rainier Half Marathon

Trail Run 5 km 10 km 13 mi
Jul
19
Su

B & O Half Marathon

10 km Half Marathon
Jul
25-26
Sa - Su

Jack & Jill Downhill Marathon

13 mi 26 mi