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Half Marathons Found In Washington in August
View all ↓Half Marathons in Washington in August 2025
Find A Race is the US's favourite event listings site. Check out our list of August 2025 Half Marathons in Washington below.
Race Calendar: Half Marathons Found In August
πBoosted
Iron Horse Half Marathon
North Bend, Washington
24 Aug 25
$56.73 - $101.01
πBoosted
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Chiawana Park, Pasco, WA (33) 30
Pasco, Washington
16 Aug 25
$27.75 - $70.15
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Singles & Friends Running Club 5K/10K/13.1 SEATTLE
Seattle, Washington
02 Aug 25
$32.80 - $48.70
Galloping Gertie
Gig Harbor, Washington
02 Aug 25
$76.26 - $118.66
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Heritage Park, Olympia, WA (31) 150
Olympia, Washington
02 Aug 25
$27.75 - $70.15
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Langus Riverfront Park, Everett, WA (31) 80
Everett, Washington
02 Aug 25
$27.75 - $70.15
Run for Wine & Cheese 5K/10K/13.1 SEATTLE
Seattle, Washington
02 Aug 25
$32.80 - $48.70
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Heritage Park, Olympia, WA (32) 150
Olympia, Washington
09 Aug 25
$27.75 - $70.15
Race the Reserve Whidbey Island
Coupeville, Washington
09 Aug 25
$32.80 - $69.90
Twilight at the Bay
University Place, Washington
16 Aug 25
$76.26 - $118.66
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Chiawana Park, Pasco, WA (33) 30
Pasco, Washington
16 Aug 25
$27.75 - $70.15
Run for Mental Health 5K/10K/13.1 SEATTLE
Seattle, Washington
16 Aug 25
$32.80 - $48.70
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Lowell Riverfront Park, Everett, WA (33) 80
Everett, Washington
16 Aug 25
$27.75 - $70.15
The Cookie Dash Run 5K/10K/13.1 SEATTLE
Seattle, Washington
16 Aug 25
$32.80 - $48.70
Ninja 5K, 10K, & Half Marathon at Liberty Park, Spokane, WA (34) 20
Spokane, Washington
23 Aug 25
$33.05 - $70.15
Ninja 1M, 5K, 10K, 15K, & Half Marathon at Heritage Park, Olympia, WA (34) 150
Olympia, Washington
23 Aug 25
$27.75 - $70.15
Tacoma Narrows Half Marathon / 5K
Tacoma, Washington
23 Aug 25
$59.80 - $123.40
Iron Horse Half Marathon
North Bend, Washington
24 Aug 25
$56.73 - $101.01
Medal Madness 1M, 5K, 10K, 15K, & Half Marathon at Heritage Park, Olympia, WA (35)
Olympia, Washington
30 Aug 25
$27.75 - $70.15
Labor Day Run 5K/10K/13.1 SEATTLE
Seattle, Washington
30 Aug 25
$32.80 - $48.70
Sunrise Marathon 5K/10K/13.1 SEATTLE
Seattle, Washington
30 Aug 25
$32.80 - $48.70
Showing 1-19 of 19 results