Running races in or near Seatac, WA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Seatac, WA area. Races listed here include both walking and running events of various distances — from 1-milers, to 5Ks, to marathons, and everything else in between.
Sammamish City Marathon - Half 13.1
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Sammamish City Marathon - Kids Race - 2 ...
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Sammamish City Marathon - Sponsor
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Run the Trestle - 5k
Organization: Sammamish Running
Date of Race: 07-25-2026
Description: Join us for this Summer Classic! Run the Trestle. The half ...
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Sammamish City Marathon - Full 26.2
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Half Sam - 10k
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Half Sam - Sponsor
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Run the Trestle - Half 13.1
Organization: Sammamish Running
Date of Race: 07-25-2026
Description: Join us for this Summer Classic! Run the Trestle. The half ...
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Run the Trestle Maple Valley Half 13.1, 10k, ...
Organization: Sammamish Running
Date of Race: 07-25-2026
Description: Join us for this Summer Classic! Run the Trestle. The half ...
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Half Sam
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Sammamish City Marathon - 5k (3.1 mi)
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Half Sam - 13.1
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Run the Trestle - 10k
Organization: Sammamish Running
Date of Race: 07-25-2026
Description: Join us for this Summer Classic! Run the Trestle. The half ...
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Sammamish City Marathon - 10k (6.2 mi)
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Half Sam - 5k
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Half Sam - Virtual Sam
Organization: Sammamish Running
Date of Race: 08-23-2026
Description: One of the fastest and flattest coures in the region. Come ...
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Sammamish City Marathon
Organization: Sammamish Running
Date of Race: 10-24-2026
Description: Join us for the Sammamish City Marathon. New ...
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Bubble Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 08-01-2026
Description: If you’ve done a traditional 5K, you know they ...
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Bubble Run - Value Registrations- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶5̶4̶.̶9̶5̶
Organization: Viral Run
Date of Race: 08-01-2026
Description: If you’ve done a traditional 5K, you know they ...
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Foam Glow - VIP Registration R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶9̶9̶.̶9̶5̶
Organization: Viral Run
Date of Race: 08-01-2026
Description: Foam Glow 5K™ is a fun filled experience exposing runners to ...
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Foam Glow - Value Registrations- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶5̶4̶.̶9̶5̶
Organization: Viral Run
Date of Race: 08-01-2026
Description: Foam Glow 5K™ is a fun filled experience exposing runners to ...
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Bubble Run | Seattle 2026
Organization: Viral Run
Date of Race: 08-01-2026
Description: If you’ve done a traditional 5K, you know they ...
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Foam Glow | Seattle 2026
Organization: Viral Run
Date of Race: 08-01-2026
Description: Foam Glow 5K™ is a fun filled experience exposing runners to ...
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Suicide Prevention Summit
Organization: Pierce County Parks and Recreation
Date of Race: 09-18-2026
Description: Description
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Camps - 2026
Organization: South Sound Cross Country Camp
Date of Race: 07-27-2026
Description: The South Sound Cross Country Camp in an instructional camp for ...
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Complete list of running events in and near Seatac, WA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Seatac
About Seatac
Seatac (WA) is a city in King County with an estimated population of 26,909.[4]
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Did you know?
In 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
