Running races in or near Mercer Island, WA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Mercer Island, 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: 06-07-2025
Description: Welcome to the 10th annual Lake Wilderness Run!! We're so excited ...
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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 ...
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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 ...
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Cedar River Half 13.1 - Mile Marker Sponsor
Organization: Sammamish Running
Date of Race: 01-25-2025
Description: Out and back along the Cedar River Trail starting out at ...
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Fall City Classic - Race Series - Fall ...
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Fall City Classic - 8k
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Fall City Classic - 5k
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Fall City Classic - 1k
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Fall City Classic - Half 13.1
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Cedar River Half 13.1 - Individual Age group/open
Organization: Sammamish Running
Date of Race: 01-25-2025
Description: Out and back along the Cedar River Trail starting out at ...
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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 ...
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Fall City Classic
Organization: Sammamish Running
Date of Race: 03-22-2025
Description: Join us for the Fall City Classic on Saturday ...
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Kids 7-15 Gnome Dash - Kids Gnome Dash ...
Organization: Sammamish Running
Date of Race: 01-25-2025
Description: Out and back along the Cedar River Trail starting out at ...
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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 ...
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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 ...
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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 ...
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Cedar River Half 13.1
Organization: Sammamish Running
Date of Race: 01-25-2025
Description: Out and back along the Cedar River Trail starting out at ...
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Walking-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 ...
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Walking-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 ...
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2025 Camp Gilead River Run 5K
Organization: Camp Gilead
Date of Race: 05-26-2025
Description: The River Run 5K is an event to raise money for ...
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Price
Organization: Camp Gilead
Date of Race: 05-26-2025
Description: The River Run 5K is an event to raise money for ...
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Beaver Lake Triathon 2025
Organization: Sammamish Running
Date of Race: 08-24-2025
Description: Race starts promptly at 8 am at the Beaver Lake beach ...
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Cross Country (coed)
Organization: Seattle Preparatory School
Date of Race: 06-23-2025
Description: In this highly energetic camp, campers will learn to train like ...
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Competitive Track and Field
Organization: BASIS Independent Bellevue
Date of Race: 03-17-2025
Description: Calling all BLV athletes! Join us for the second season of ...
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Triathlon-Sprint - Beaver Lake Triathlon - Full 1/4S, ...
Organization: Sammamish Running
Date of Race: 08-24-2025
Description: Race starts promptly at 8 am at the Beaver Lake beach ...
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Complete list of running events in and near Mercer Island, WA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Mercer Island
About Mercer Island
Mercer Island (WA) is a city in King County with an estimated population of 22,699.[4]
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In 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
