Halloween Trick or Trot Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Half marathons in Seattle, Washington
2026 and 2027 race calendar. 33 upcoming, updated daily.
October 2026
PB&J Fuel Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
November 2026
Run for Mental Health 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Veterans Day Freedom Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
UW Medicine Seattle Marathon
Seattle, Washington, United States · Nov 28 to Nov 29, 2026
2026 Seattle Ghost Marathon, Half & 50K
Seattle, Washington, United States
Coffee Lovers Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Thanksgiving Gobble Trot Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
December 2026
Run for Breast Cancer 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Sunrise Marathon 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
A Merry Christmas Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
New Year's Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
January 2027
MLK Jr. Freedom Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Sunrise Marathon 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Coffee Lover Run SEATTLE
Seattle, Washington, United States
Run for Donut SEATTLE
Seattle, Washington, United States
February 2027
Run for Chocolate 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Valentine's Day Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
My Better Half Marathon
Seattle, Washington, United States
Run For Mental Health SEATTLE
Seattle, Washington, United States
Run Together Against Breast Cancer SEATTLE
Seattle, Washington, United States
March 2027
St. Paddy's Day Lucky Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Sunrise Marathon 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Always Hope Easter Run SEATTLE
Seattle, Washington, United States
SuperHeroes Run SEATTLE
Seattle, Washington, United States
April 2027
Run for PB&J 5k/10k/13.1 SEATTLE
Seattle, Washington, United States
Sloth Run 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
Coffee Lover Run SEATTLE
Seattle, Washington, United States
Run for Donut SEATTLE
Seattle, Washington, United States
May 2027
Run for Chocolate 5k/10k/13.1 SEATTLE
Seattle, Washington, United States
SuperHeroes Run SEATTLE
Seattle, Washington, United States
June 2027
Run Juneteenth Day 5K/10K/13.1 SEATTLE
Seattle, Washington, United States
September 2027
The Brooks Orca Half Marathon presented by REI
Seattle, Washington, United States · Sep 18 to Sep 19, 2027