August 2026 races in Seattle

There are 31 running events listed in Seattle for August 2026 — 30 5K, 17 10K, 15 Half Marathon, 2 Marathon, 1 Trail Run — starting with Galloping Gertie on Sat, Aug 1, 2026. Every listing shows the date, venue, and distances, with a direct link to registration.

• Sat, Aug 1, 2026 Galloping Gertie Tacoma Narrows Airport · Gig Harbor, WA · From $49 5K10KHalf Marathon Road
• Sat, Aug 1, 2026 Ninja 5K, 10K & 13.1M at Everett, WA (31) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 1, 2026 The Wacky Dash 5K 22500 SE 248TH ST · Maple Valley, WA · From $30 5K Road
• Sun, Aug 2, 2026 Craft Classic Seattle 160 161st Ave NE · Redmond, WA · From $33 5KHalf Marathon Road
• Sat, Aug 8, 2026 Cougar Mountain Trail Run Series (August) Sky Country Trailhead · Bellevue, WA · From $40 5K10KMarathonTrail Run Trail
• Sat, Aug 8, 2026 Ninja 5K, 10K, & 13.1M at Everett, WA (32) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 8, 2026 Race the Reserve Whidbey Island ** Race Day Packet Pickup and Race Start, Coupeville Elementary School · From $30 5K10KHalf Marathon Road
• Sat, Aug 8, 2026 Paul Ruston Memorial Run 4248 S 288th St · Auburn, WA · From $10 5K Road
• Sun, Aug 9, 2026 Tunnel Vision Marathon & Half Marathon NF-906, Hyak Dr E. · Snoqualmie Pass, WA 5K10KHalf MarathonMarathon Road
• Sun, Aug 9, 2026 17th Lake Union 10K Run/Walk Lake Union Park (near MOHAI) · Seattle, WA · From $40 10K Road
• Sun, Aug 9, 2026 Mimosa 5K 319 S. Meridian · Puyallup, WA · From $30 5K Road
• Sun, Aug 9, 2026 Widdy's Work presents Stomp Out the Stigma 9401 Farwest Drive SW · Lakewood, WA · From $22 5K Road
• Sun, Aug 9, 2026 Here and Now Project 5K for Today 12801 86th Ave E · Puyallup, WA · From $35 5K Road
• Sat, Aug 15, 2026 Bagel Run 5K/10K/13.1 SEATTLE 8498 Seaview Pl NW (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 15, 2026 Run for PB& J 5K/10K/13.1 SEATTLE Golden Gardens Park (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 15, 2026 Ninja 5K, 10K & 13.1M at Everett, WA (33) 3505 Lowell Snohomish River Rd, · Everett, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 15, 2026 Move Puyallup 5K 1100 N Meridian Ave · Puyallup, WA 5K Road
• Sun, Aug 16, 2026 Twilight at the Bay Chambers Bay Loop Trail · University Place, WA · From $33 5K10KHalf Marathon Road
• Sun, Aug 16, 2026 Emerald City 5k 2101 N Northlake Way · Seattle, WA · From $23 5K Road
• Sun, Aug 16, 2026 Sundae Runday 5895 Lake Washington Blvd S · Seattle, WA · From $10 5K10K Road
• Sat, Aug 22, 2026 2026 Kirk-Wood Half Marathon 5520 108th Ave NE · Kirkland, WA · From $75 5KHalf Marathon Road
• Sat, Aug 22, 2026 Run A Muk 5k/10k 304 Lincoln St · Mukilteo, WA · From $20 5K10K Road
• Sat, Aug 22, 2026 17th Annual Parkland Pace or Race Washington High School · Tacoma, WA · From $15 5K Road
• Sat, Aug 29, 2026 Seattle Torch Relay 7401 164th Ave NE · Redmond, WA 5K Road
• Sat, Aug 29, 2026 Run for Breast Cancer 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 29, 2026 Sloth Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Aug 29, 2026 Tacoma Narrows Half Marathon / 10K / 5K 2502 S Tyler St · Tacoma, WA · From $35 5K10KHalf Marathon Road
• Sat, Aug 29, 2026 Suvidha International 5K Redmond, Seattle Marymoor Park · Redmond, WA · From $25 5K Road
• Sat, Aug 29, 2026 Summer Spirit Run 74th and Sand Point Wy · Seattle, WA · From $6 5K10K Road
• Sun, Aug 30, 2026 Iron Horse Half Marathon 1711 Boalch Ave NW · North Bend, WA · From $82 5KHalf Marathon Road
• Sun, Aug 30, 2026 Community Corn Roast & 5K Family Fun Run/Walk/Roll 1301 S. Baltimore St Tacoma, WA US 98465 5K Road

Quick answers

How many races are there in Seattle in August 2026?

31 running events are listed in Seattle for August 2026, from Galloping Gertie on Sat, Aug 1, 2026 to Community Corn Roast & 5K Family Fun Run/Walk/Roll on Sun, Aug 30, 2026. Every listing links directly to registration.

What distances can I race in Seattle in August?

The August 2026 calendar in Seattle includes 30 5K, 17 10K, 15 Half Marathon, 2 Marathon, 1 Trail Run.

What is the first race of August 2026 in Seattle?

Galloping Gertie on Sat, Aug 1, 2026 at Tacoma Narrows Airport.