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Half Marathon Calendar near Black Diamond 2025-2026

Monthly updates for Black Diamond

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

Explore the top half marathons near Black Diamond for 2025-2026! We've gathered 54 exciting races in the area. Check out our detailed list below to find your next local race.

December 2025
Dec
27
Sa

The Best Races - Seattle

5 km 10 km 13 mi
Dec
27
Sa

Lake Sammamish Classic 13.1

13 mi
Dec
27
Sa

Boxing Day Run - Puyallup

5 km 10 km Half Marathon 84 km
January 2026
Jan
3
Sa

The Best Races - Seattle

5 km 10 km 13 mi
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
18
Su

Birthday Run - Seattle

7 mi 13 mi 26 mi
February 2026
Feb
7
Sa

The Best Races - Seattle

5 km 10 km 13 mi
Feb
8
Su

My Better Half Marathon

5 km 10 km 13 mi
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
March 2026
Mar
7
Sa

Lake Sammamish Half Marathon

Half Marathon
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
21
Sa

Dash Point Trail Run

Trail Run 10 km 13 mi
Mar
28
Sa

Spring Run for Fun @ Bridle Trails

Trail Run 5 km 10 km Half Marathon Marathon
Mar
29
Su

Redmond Marathon

Trail Run 13 mi 26 mi