October 2026 races in Seattle

There are 39 running events listed in Seattle for October 2026 — 38 5K, 19 10K, 11 Half Marathon, 2 Marathon, 4 Trail Run — starting with Run for the Gnomes Half Marathon & 5K on Sat, Oct 3, 2026. Every listing shows the date, venue, and distances, with a direct link to registration.

• Sat, Oct 3, 2026 Run for the Gnomes Half Marathon & 5K 22500 SE 248th Street · Maple Valley, WA · From $32 5K10KHalf Marathon Road
• Sat, Oct 3, 2026 Haunted 5K, 10K, 13.1M & 26.2M at Everett, WA (40) 400 Smith Island Rd · Everett, WA · From $30 5K10KHalf MarathonMarathon Road
• Sat, Oct 3, 2026 Community Energy Run 3301 Old Hartford Road · Lake Stevens, WA · From $35 5K Road
• Sat, Oct 3, 2026 Monster Mad Dash 5K 23000 Lakeview Dr · Mountlake Terrace, WA · From $35 5K Road
• Sat, Oct 3, 2026 Seattle Kraken 5K 7201 E Greenlake Drive North · Seattle, WA · From $30 5K Road
• Sat, Oct 3, 2026 North Bend Trail Fest 30k - 10k 1300 W North Bend Way 5K10KTrail Run Trail
• Sun, Oct 4, 2026 Poulsbo Half Marathon & 10k 18937 Front St NE · Poulsbo, WA · From $38 5K10KHalf Marathon Road
• Sun, Oct 4, 2026 Shuck & Share 5K +1 (4 miles) -2026 Huff & Puff · Shelton, WA · From $25 5K Road
• Sun, Oct 4, 2026 Baby Steps 5K 2026 Roegner Park · Auburn, WA · From $10 5K Road
• Sat, Oct 10, 2026 Bagel Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 10, 2026 Coffee Lovers Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 10, 2026 Defiance 50K / 30K / 15K Point Defiance Park · Tacoma, WA · From $58 5KTrail Run Trail
• Sat, Oct 10, 2026 Haunted 5K, 10K, & 13.1M at Everett WA (41) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 10, 2026 5th Annual Fall Classic PLU Meadows Disc Golf Course · Tacoma, WA · From $15 5K Road
• Sun, Oct 11, 2026 NIGHT NATION RUN - SEATTLE LUMEN FIELD · Seattle, WA · From $40 5K Road
• Sun, Oct 11, 2026 Hope and Heroes Run 6046 W Lake Sammamish PKWY NE · Redmond, WA · From $5 5K10K Road
• Sun, Oct 11, 2026 2026 The Snohomish River Run Marathon, Half Marathon, 10K and 5K 1301 1st St · Snohomish, WA · From $45 5K10KHalf MarathonMarathon Road
• Sun, Oct 11, 2026 The Stein Dash 110 9th Ave SW · Puyallup, WA · From $25 5K Road
• Sun, Oct 11, 2026 Pumpkin Spice Run 5902 Lake Washington Blvd South · Seattle, WA · From $12 5K10K Road
• Sat, Oct 17, 2026 Lake Washington Half Marathon Juanita Beach Park · Kirkland, WA · From $78 5KHalf Marathon Road
• Sat, Oct 17, 2026 Haunted 5K, 10K & 13.1M at Everett, WA (42) 3505 Lowell Snohomish River Rd, · Everett, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 17, 2026 Where's Bigfoot 5k 5520 Ravenna Ave NE · Seattle, WA · From $33 5K Road
• Sun, Oct 18, 2026 Running Scared 5K/13K - Seattle Green Lake Park · Seattle, WA · From $30 5K Road
• Sun, Oct 18, 2026 Alaska Airlines Dawg Dash 5K/10K University of Washington Campus in Seattle · From $15 5K10K Road
• Sun, Oct 18, 2026 I Can And I Will Run! 7201 East Green Lake Dr N · Seattle, WA · From $20 5K10K Road
• Sun, Oct 18, 2026 Puyallup Valley Fall Hops Harvest 5K 211 W. Stewart Ave. · Puyallup, WA · From $25 5K Road
• Sat, Oct 24, 2026 2026 Greenlake 5K and Wellness Festival 7201 East Green Lake Dr N · Seattle, WA · From $35 5K Road
• Sat, Oct 24, 2026 West Seattle Monster Dash 2026 8611 Fauntleroy Way Southwest · Seattle, WA · From $20 5K Road
• Sat, Oct 24, 2026 Issaquah Schools Foundation Monster Mash 5K 4455 E Lake Sammamish Pkwy SE · Issaquah, WA · From $35 5K Road
• Sun, Oct 25, 2026 Snoqualmie Valley Harvest Run 39903 SE Park ST · Snoqualmie, WA · From $5 5K10K Road
• Sun, Oct 25, 2026 Run Scared 5895 Lake Washington Blvd S · Seattle, WA · From $25 5K10K Road
• Sun, Oct 25, 2026 Captain Jack's Treasure Run 15670 NE 85th St · Redmond, WA · From $10 5K Road
• Thu, Oct 29, 2026 Ten Trails Active Club Trot n' Treat Relay Scramble 23089 SE Fir St · Black Diamond, WA Trail Run Trail
• Sat, Oct 31, 2026 Halloween Trick or Trot Run 5K/10K/13.1 SEATTLE 8498 Seaview Pl NW (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 31, 2026 PB&J Fuel Run 5K/10K/13.1 SEATTLE 8498 Seaview Pl NW (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
• Sat, Oct 31, 2026 Cougar Mountain Trail Run Series (October) Sky Country Trailhead · Bellevue, WA · From $40 5KTrail Run Trail
• Sat, Oct 31, 2026 Haunted Hustle 5K & 10K 1710 12th Ave SW · Puyallup, WA · From $30 5K10K Road
• Sat, Oct 31, 2026 Wicked Fast 5K & 10K Dune Peninsula Park · Tacoma, WA · From $15 5K10K Road
• Sat, Oct 31, 2026 Trick or Treat 5k 5900 Lake Washington Blvd S · Seattle, WA · From $33 5K Road

Quick answers

How many races are there in Seattle in October 2026?

39 running events are listed in Seattle for October 2026, from Run for the Gnomes Half Marathon & 5K on Sat, Oct 3, 2026 to Trick or Treat 5k on Sat, Oct 31, 2026. Every listing links directly to registration.

What distances can I race in Seattle in October?

The October 2026 calendar in Seattle includes 38 5K, 19 10K, 11 Half Marathon, 2 Marathon, 4 Trail Run.

What is the first race of October 2026 in Seattle?

Run for the Gnomes Half Marathon & 5K on Sat, Oct 3, 2026 at 22500 SE 248th Street.