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Running Calendar near South Lake Union 2025-2026

Explore the top running races near South Lake Union for 2025-2026! We've gathered 155 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
September 2026
Sep
12
Sa

Cascade Express Marathon
Trail Run 13 mi 26 mi
Sep
12
Sa

Beat the Blerch
Trail Run 5 km 10 km Half Marathon Marathon
Sep
19-20
Sa - Su

Seattle North Spartan Trifecta Weekend
Obstacle Run 5 km 10 km Half Marathon
Sep
19-20
Sa - Su

Orca Half Marathon
8 mi Half Marathon
Sep
20
Su

Run of the Mill 5k - Mill Creek
5 km
Sep
20
Su

Quilcene Oyster Races
5 km 10 km Half Marathon
October 2026
Oct
2-4
Fr - Su

North Bend Trail Fest
Trail Run 10 km 30 km
Oct
3
Sa

Run for the Gnomes Half Marathon
5 km Half Marathon
Oct
5
Mo

North Bend Skyline 30K
Trail Run
Oct
10
Sa

Defiance 50k
15 km 30 km 50 km
Oct
11
Su

Snohomish River Run
5 km 10 km Half Marathon Marathon
Oct
17
Sa

Where's Bigfoot 5K
5 km
Oct
24
Sa

Wicked Fast 10K
5 km 10 km
November 2026
Nov
7
Sa

Grand Ridge Trail Run
Trail Run 5 mi Half Marathon Marathon 50 km
Nov
10
Tu

Run the Bay
5 km 10 km Half Marathon