Running races in or near Newcastle, WA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Newcastle, 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.
Running-Marathon - Individual Age group/open
Organization: Sammamish Running
Date of Race: 10-25-2025
Description: Join us for the inaugural Sammamish Marathon. This USATF certified course ...
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Running-5K - Individual Age group/open
Organization: Lake Wilderness Triathlon
Date of Race: 06-06-2026
Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...
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Running-10K - Individual Age group/open
Organization: Lake Wilderness Triathlon
Date of Race: 06-06-2026
Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...
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Running-5K - Individual Age group/open
Organization: Mount Tahoma SDA
Date of Race: 11-27-2025
Description: The Thanksgiving Day 5K takes place on a ...
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Seattle Waterfront 10k/5k Race - 5k
Organization: Sammamish Running
Date of Race: 10-18-2025
Description: Come out and race on the new Seattle Waterfront. Flat and ...
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Running-Half marathon - Individual Age group/open
Organization: Lake Wilderness Triathlon
Date of Race: 06-06-2026
Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...
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Fastest of the Fastest - 10k
Organization: Sammamish Running
Date of Race: 11-01-2025
Description: Join us for the Fastest of the Fastest Half 13.1, 10k, ...
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Seattle Waterfront 10k/5k Race - 10k
Organization: Sammamish Running
Date of Race: 10-18-2025
Description: Come out and race on the new Seattle Waterfront. Flat and ...
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Fastest of the Fastest - Half 13.1
Organization: Sammamish Running
Date of Race: 11-01-2025
Description: Join us for the Fastest of the Fastest Half 13.1, 10k, ...
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Fastest of the Fastest - 5k
Organization: Sammamish Running
Date of Race: 11-01-2025
Description: Join us for the Fastest of the Fastest Half 13.1, 10k, ...
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Soaring Eagle Turkey Trot - 5k
Organization: Sammamish Running
Date of Race: 11-27-2025
Description: Join us for the Turkey Trot Soaring Eagle Park 5k, 10k ...
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Sammamish Marathon
Organization: Sammamish Running
Date of Race: 10-25-2025
Description: Join us for the inaugural Sammamish Marathon. This USATF certified course ...
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Soaring Eagle Turkey Trot
Organization: Sammamish Running
Date of Race: 11-27-2025
Description: Join us for the Turkey Trot Soaring Eagle Park 5k, 10k ...
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Lake Sammamish Classic 13.1 - Individual Age group/open
Organization: Sammamish Running
Date of Race: 12-27-2025
Description: Last Half of 2025 will be a Classic - Out and ...
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Soaring Eagle Turkey Trot - 2k kid's Trot ...
Organization: Sammamish Running
Date of Race: 11-27-2025
Description: Join us for the Turkey Trot Soaring Eagle Park 5k, 10k ...
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Fastest of the Fastest Half 13.1, 10k, 5k
Organization: Sammamish Running
Date of Race: 11-01-2025
Description: Join us for the Fastest of the Fastest Half 13.1, 10k, ...
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Seattle Waterfront 10k/5k Race - Sponsor
Organization: Sammamish Running
Date of Race: 10-18-2025
Description: Come out and race on the new Seattle Waterfront. Flat and ...
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Soaring Eagle Turkey Trot - 10k
Organization: Sammamish Running
Date of Race: 11-27-2025
Description: Join us for the Turkey Trot Soaring Eagle Park 5k, 10k ...
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Lake Sammamish Classic 13.1 - Mile Marker Sponsor
Organization: Sammamish Running
Date of Race: 12-27-2025
Description: Last Half of 2025 will be a Classic - Out and ...
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Lake Sammamish Classic 13.1
Organization: Sammamish Running
Date of Race: 12-27-2025
Description: Last Half of 2025 will be a Classic - Out and ...
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Lake Wilderness Run
Organization: Lake Wilderness Triathlon
Date of Race: 06-06-2026
Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...
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Seattle Waterfront 10k/5k
Organization: Sammamish Running
Date of Race: 10-18-2025
Description: Come out and race on the new Seattle Waterfront. Flat and ...
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Thanksgiving Day 5K (Walk, Bike, or Run)
Organization: Mount Tahoma SDA
Date of Race: 11-27-2025
Description: The Thanksgiving Day 5K takes place on a ...
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Walking-5K - open
Organization: Mount Tahoma SDA
Date of Race: 11-27-2025
Description: The Thanksgiving Day 5K takes place on a ...
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Biking-5k - Individual Age group/open
Organization: Mount Tahoma SDA
Date of Race: 11-27-2025
Description: The Thanksgiving Day 5K takes place on a ...
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Complete list of running events in and near Newcastle, WA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Newcastle
About Newcastle
Newcastle (WA) is a city in King County with an estimated population of 10,380.[4]
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Did you know?
Historically, more marathons are run in the month of October than any other month (in the U.S.).
