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Snake River Canyon Half Marathon
Out-and-back through Snake River Canyon
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Padden Mudfest
Muddy trail loops around Lake Padden
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Lake Sammamish Half Marathon
Paved trail, Marymoor Park to Lake Sammamish
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The Running Rugger 5K
A loop around the University of Washington campus
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St Patrick's Day 5k/10k
A trail race through Legion Park in downtown Arlington
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Frosty Moss Relay
Fifteen legs along the wild Olympic Discovery Trail to Blyn
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St. Paddy's Day Run
Half marathon along Tacoma's Ruston Way waterfront
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Run the Green
Out-and-back along the Green River Trail
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Pi Day Dash
3.1415 miles around Seattle's Green Lake
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Pie High Trail Run
A hilly Pi Day trail run finished off with pie
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Runnin' O' the Green 5K & 8K
Runs through Bellingham's historic Fairhaven Village
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St. Patrick's Day 5K & 10K Run
45th annual, starts from Granite Lake Park
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Donut Dash 5k
Around Capitol Lake, out and back on Deschutes Parkway
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St. Patrick's Day Dash
One of the largest St. Patrick's Day races in the US
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Shamrock Shuffle
Chases leprechauns through Spokane's Riverfront Park
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Dash Point
Sandy beaches and forest trails along Puget Sound at Dash Point
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Chuckanut 50k
A legendary Pacific Northwest ultra along Chuckanut Ridge
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Spring Run For Fun @ Bridle Trails
Forest loops past horse arenas at Bridle Trails
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The Running Of The Beavers
Ballard High fundraiser on the Golden Gardens beach
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Leif to Leif 5K Run/Walk
From Ballard's heart down to Shilshole Bay
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Couve Clover Run – 3, 7 & 10 miles or try our Lucky Leap 1 Mile
Fast course along Vancouver's Columbia River waterfront
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Run Forest Run 5k
A costumed loop around Seattle's Green Lake
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Badger Mountain Challenge
Trail ultra over Badger and Candy Mountains, WA
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Whitehorse Half Marathon
Out-and-back on the Whitehorse Trail, Stillaguamish Valley
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Dizzy Daze
Pancake-flat loop around Seattle's Green Lake
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Hop Hop Half
Along Lacamas Lake and through Camas Meadows golf course
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Mill Town Marathon
Puget Sound and Cascade views from the Port of Everett
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Daffodil 8K
The Daffodil Festival's own run on the Foothills Trail
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Save any of these to your season in RunCalendar and hear the morning entries open. Free on iPhone, no account needed.
Every race here is published by its organiser; RunCalendar checks the date and the entry window against the organiser's own page and rebuilds this calendar every night. A confirmed date shows its day; a provisional one shows only its month. Last updated 22 October 2026.