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Races in Seatac, WA

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.

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Running-5K - Individual Age group/open

Organization: CAT Running

Date of Race: 04-19-2025

Description: Join us for the love of the run and animals! Your ...

Running-5K - Individual Age group/open

Organization: Lake Wilderness Triathlon

Date of Race: 06-07-2025

Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...

Running-5K - Individual Age group/open

Organization: Pearl Foundation of Puget Sound

Date of Race: 04-26-2025

Description: Join us for an inspiring fundraiser dedicated to supporting the Pearl ...

Running-5K - Individual Age group/open

Organization: Pearl Foundation of Puget Sound

Date of Race: 04-26-2025

Description: Join us for an inspiring fundraiser dedicated to supporting the Pearl ...

Running-10K - Individual Age group/open

Organization: Lake Wilderness Triathlon

Date of Race: 06-07-2025

Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...

Youth Cross Country

Organization: Pierce County Parks

Date of Race: 04-14-2025

Description: DescriptionCome join Pierce County Parks and Recreation this Spring for a ...

Bubble Run | Seattle

Organization: Viral Run

Date of Race: 08-03-2025

Description: If you’ve done a traditional 5K, you know they ...

Hood Canal Salmon Run 5K - Youth Registration ...

Organization: Hood Canal Salmon Enhancement Group

Date of Race: 06-14-2025

Description: The 5K course offers a flat, unpaved trail around the ...

Bubble Run - Exclusive VIP Registration- Regular Price ...

Organization: Viral Run

Date of Race: 08-03-2025

Description: If you’ve done a traditional 5K, you know they ...

Newcastle Beach Eastrail Redhawk - Race Series 2025 ...

Organization: Sammamish Running

Date of Race: 06-21-2025

Description: Join us for the Newcastle Beach 10k, Half 13.1, 5k part ...

2nd Annual Hood Canal Salmon Run 5K

Organization: Hood Canal Salmon Enhancement Group

Date of Race: 06-14-2025

Description: The 5K course offers a flat, unpaved trail around the ...

Hood Canal Salmon Run 5K - Adult Registration ...

Organization: Hood Canal Salmon Enhancement Group

Date of Race: 06-14-2025

Description: The 5K course offers a flat, unpaved trail around the ...

Newcastle Beach Eastrail Redhawk - 5k

Organization: Sammamish Running

Date of Race: 06-21-2025

Description: Join us for the Newcastle Beach 10k, Half 13.1, 5k part ...

Muddy Dash - Value Registration- Regular Price $74.95

Organization: Viral Run

Date of Race: 07-26-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

Running-Half marathon - Individual Age group/open

Organization: Lake Wilderness Triathlon

Date of Race: 06-07-2025

Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...

Bubble Run - Value Registrations- Regular Price $54.95

Organization: Viral Run

Date of Race: 08-03-2025

Description: If you’ve done a traditional 5K, you know they ...

Muddy Dash - Exclusive VIP Registration- Regular Price ...

Organization: Viral Run

Date of Race: 07-26-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

Newcastle Beach Eastrail Redhawk - 10k

Organization: Sammamish Running

Date of Race: 06-21-2025

Description: Join us for the Newcastle Beach 10k, Half 13.1, 5k part ...

Newcastle Beach Eastrail Redhawk - Half 13.1

Organization: Sammamish Running

Date of Race: 06-21-2025

Description: Join us for the Newcastle Beach 10k, Half 13.1, 5k part ...

Newcastle 10k, 13.1 Half, 5k Eastrail Redhawk

Organization: Sammamish Running

Date of Race: 06-21-2025

Description: Join us for the Newcastle Beach 10k, Half 13.1, 5k part ...

Lake Wilderness Run 2025

Organization: Lake Wilderness Triathlon

Date of Race: 06-07-2025

Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...

Muddy Dash | Seattle

Organization: Viral Run

Date of Race: 07-26-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

CAT Running 9th Annual 5K Fun Run/Walk

Organization: CAT Running

Date of Race: 04-19-2025

Description: Join us for the love of the run and animals! Your ...

5K Run/Walk

Organization: Pearl Foundation of Puget Sound

Date of Race: 04-26-2025

Description: Join us for an inspiring fundraiser dedicated to supporting the Pearl ...

Foothills Dash 2025

Organization: Pierce County Parks

Date of Race: 06-28-2025

Description: DescriptionThis fun and scenic race on the Foothills Trail is open ...

Saucony

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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The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.

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