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-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-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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Redmond City Marathon 26.2 - Redmond City Full ...
Organization: Sammamish Running
Date of Race: 03-29-2026
Description: Join us for the inaugral running of the Redmond Marathon 26.2.
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Cedar River Half 13.1, 10k, 5k - 10k
Organization: Sammamish Running
Date of Race: 01-24-2026
Description: Dust off those running shoes and get the year started off ...
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Race to the Top of Mount Si - ...
Organization: Sammamish Running
Date of Race: 01-10-2026
Description: Be the first up to the top of Mount Si in ...
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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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Cedar River Half 13.1, 10k, 5k - 5k
Organization: Sammamish Running
Date of Race: 01-24-2026
Description: Dust off those running shoes and get the year started off ...
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Cedar River Half 13.1, 10k, 5k - Half ...
Organization: Sammamish Running
Date of Race: 01-24-2026
Description: Dust off those running shoes and get the year started off ...
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Redmond City Marathon 26.2 - Redmond City Half ...
Organization: Sammamish Running
Date of Race: 03-29-2026
Description: Join us for the inaugral running of the Redmond Marathon 26.2.
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Running-3.7 mi - Race to the Top of ...
Organization: Sammamish Running
Date of Race: 01-10-2026
Description: Be the first up to the top of Mount Si in ...
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Cedar River Half 13.1, 10k, 5k
Organization: Sammamish Running
Date of Race: 01-24-2026
Description: Dust off those running shoes and get the year started off ...
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Redmond City Marathon 26.2
Organization: Sammamish Running
Date of Race: 03-29-2026
Description: Join us for the inaugral running of the Redmond Marathon 26.2.
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2026 Camp Gilead River Run 5K
Organization: Camp Gilead
Date of Race: 05-25-2026
Description: The River Run 5K is an event to raise money for ...
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Price
Organization: Camp Gilead
Date of Race: 05-25-2026
Description: The River Run 5K is an event to raise money for ...
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Competitive Track and Field
Organization: BASIS Independent Bellevue
Date of Race: 03-16-2026
Description: Advisor: Coach Bryant Email: kyera.bryant@basisindependent.com Calling all BLV athletes! Join ...
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Sponsor - Pre-Race Pasta Feed - Live Band ...
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Sponsor - Pre-Race Safety Briefing - Headliner
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Triathlon-Super Sprint - Full Triathlon 1/4S, 13.7B, 4.3R
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Triathlon-Super Sprint - Relay - 1/4S, 13.7B, 4.3R
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Sponsor - Supporter - Banner - Booth - ...
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Triathlon-Super Sprint - Full Triathlon 1/4S, 14B, 4R
Organization: Sammamish Running
Date of Race: 05-10-2026
Description: Join us for one of the top early premiere triathlons in ...
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Triathlon-Super Sprint - Splash n Dash (kids 7-15)
Organization: Sammamish Running
Date of Race: 05-10-2026
Description: Join us for one of the top early premiere triathlons in ...
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Sponsor - Post Race Awards Ceremony - ...
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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Sponsor - Headliner Sponsor - Beaver Lake Triathlon
Organization: Sammamish Running
Date of Race: 08-30-2026
Description: Join us for the 2026 Beaver Lake Triathlon 1/4-mile swim in ...
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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?
In 2014, there were more than 1,100 marathons and more than 541,000 finishers in the U.S.
