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Run Vibes

Half Marathons in Greater Seattle

Greater Seattle has 52 upcoming Half Marathons. Half marathons are the fastest-growing race distance, offering a true endurance challenge with a more accessible training window than the full marathon.

52 upcoming races listed

Fun racesScenic racesCompetitive racesQuirky racesFestive racesFor a Cause racesBeginner-friendly
Pirate 5K, 10K, & 13.1M at Everett, WA (15)

Set sail for a spirited run at this pirate-themed event in Everett, featuring a costume contest and multiple distances.

  • Fun
  • Competitive
  • Quirky
Sat, Apr 11, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

Seattle Cherry Blossom Run

Embrace the beauty of spring at the Seattle Cherry Blossom Run, offering 5K, 10K, and Half-Marathon routes amidst stunning blossoms.

  • Fun
  • Scenic
  • Festive
Sat, Apr 18, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Earth Day Run

Join the Earth Day Run for a half marathon in Seattle, WA. Find full details on the Magnuson Series website.

Sat, Apr 18, 2026, 10:00 AM PDT13.1 MilesSeattle, WA
Steady EffortRUN

Course · Hilly · Timed race

Run for Donuts 5K/10K/13.1 SEATTLE

Run a beautiful course, enjoy a stress-free atmosphere, and earn delicious donuts at the finish line. All paces welcome.

  • Fun
  • Scenic
  • Quirky
  • For a Cause
Sat, Apr 25, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Coffee Lovers Run 5K/10K/13.1 SEATTLE

Embrace your love for coffee and running in Seattle, enjoying a supportive, stress-free event that also gives back to charity.

  • Fun
  • Quirky
  • For a Cause
Sat, Apr 25, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Cinco De Mayo Run 5K/10K/13.1 SEATTLE

Celebrate Cinco de Mayo with a supportive run focused on personal goals, community, and giving back, all in a stress-free setting.

  • Fun
  • Festive
  • For a Cause
Sat, May 2, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Sunrise Marathon 5K/10K/13.1 SEATTLE

Embrace a beautiful sunrise and scenic views in Seattle, enjoying a supportive, stress-free run that gives back to charity.

  • Fun
  • Scenic
  • For a Cause
Sat, May 2, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Luau 5K, 10K, & 13.1M at Everett, WA (18)

Embrace the Luau spirit at this themed run in Everett, featuring multiple distances, a hilly course, and a fun best costume contest.

  • Fun
  • Competitive
  • Quirky
  • Festive
Sat, May 2, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

Kirkland Half Marathon & 5K

A community-focused half marathon and 5K on a familiar, hilly course, offering great perks and a charity donation.

  • For a Cause
Sun, May 3, 2026, 7:30 AM PDT13.1 MilesKirkland, WA
Steady EffortRUN

Course · Hilly · Family-oriented

Luau 5K, 10K, & 13.1M at Everett, WA (19)

Embrace the Luau spirit in Everett, WA, with a themed run, costume fun, and a looped course for all distances.

  • Fun
  • Competitive
  • Quirky
  • Festive
Sat, May 9, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

Memorial Day Run 5K/10K/13.1 SEATTLE

Honor, remember, and run for freedom this Memorial Day in Seattle. A supportive, scenic 13.1-mile event with a charitable mission.

  • Scenic
  • Festive
  • For a Cause
Sat, May 23, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Run for Mental Health 5K/10K/13.1 SEATTLE

Run with heart and purpose in Seattle to support mental health awareness in a welcoming, stress-free environment.

  • For a Cause
Sat, May 23, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

SuperHeroes Run 5K/10K/13.1 SEATTLE

Channel your inner superhero for a supportive, stress-free run in Seattle that celebrates everyday heroes and gives back to charity.

  • Fun
  • Quirky
  • For a Cause
Sat, Jun 6, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Run for Breast Cancer 5K/10K/13.1 SEATTLE

A supportive 13.1-mile run in Seattle, uniting the community to raise awareness and funds for breast cancer research and support.

  • Fun
  • For a Cause
Sat, Jun 6, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Medal Madness 5K, 10K, & 13.1M at Everett, WA (23)

A structured out-and-back race in Everett, WA, offering finisher medals, awards, and a chance to show off your best costume.

  • Fun
  • Competitive
  • Quirky
Sat, Jun 6, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

The Great Ferry Race

Experience a unique half marathon starting with a scenic ferry ride to Bainbridge Island, followed by a hilly course and a festive finish.

  • Scenic
  • Quirky
  • Festive
Sun, Jun 7, 2026, 8:00 AM PDT13.1 MilesBainbridge Island, WA
Push PotentialRUN

Course · Hilly · Timed race

Medal Madness 5K, 10K, & 13.1M at Everett, WA (24)

Run an out-and-back course in Everett, earn a medal, and show off your best costume. Awards and series points available.

  • Fun
  • Competitive
  • Quirky
Sat, Jun 13, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

Sloth Run 5K/10K/13.1 SEATTLE

Trade high-speed competition for a chill pace at the Sloth Run, a supportive event where every mile helps a good cause.

  • Fun
  • Quirky
  • For a Cause
Sat, Jun 20, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Run Juneteenth Day 5K/10K/13.1 SEATTLE

Celebrate Juneteenth with a supportive community run in Seattle, honoring resilience and contributing to charity with every mile.

  • Fun
  • Festive
  • For a Cause
Sat, Jun 20, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Snoqualmie Valley Half

Run a flat, fast, and scenic half marathon through the beautiful Snoqualmie Valley, finishing strong by a historic red barn.

  • Scenic
  • Competitive
Sat, Jun 20, 2026, 9:00 AM PDT13.1 MilesCarnation, WA
Steady EffortRUN

Course · Hilly · Timed race

July 4th Run 5K/10K/13.1 SEATTLE

Run free and proud this July 4th in Seattle, celebrating independence and supporting charity in a stress-free, welcoming atmosphere.

  • Fun
  • Festive
  • For a Cause
Sat, Jul 4, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Timed race

Run for Chocolate 5K/10K/13.1 SEATTLE

Indulge your sweet tooth on the Run for Chocolate in Seattle, a fun, supportive event where every mile helps a cause. All paces welcome.

  • Fun
  • Quirky
  • For a Cause
Sat, Jul 4, 2026, 7:30 AM PDT13.1 MilesSeattle, WA
Push PotentialRUN

Course · Hilly · Family-oriented

Eagle 5K, 10K & 13.1M Everett, WA (27)

Celebrate the Fourth of July with a fun, multi-loop run in Everett, featuring distances from 5K to half marathon and a best costume award.

  • Fun
  • Competitive
  • Quirky
  • Festive
Sat, Jul 4, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

Eagle 5K, 10K, & 13.1M at Everett, WA (28)

Join the Eagle 5K, 10K, or Half Marathon in Everett, featuring a multi-loop course, finisher medals, and a fun best costume award.

  • Fun
  • Competitive
  • Quirky
Sat, Jul 11, 2026, 8:30 AM PDT13.1 MilesEverett, WA
Steady EffortRUN

Course · Hilly · Timed race

See all 52 Half Marathons in Greater Seattle →

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More Half Marathon races

All races in Greater SeattleHalf Marathons in WashingtonHalf Marathons in Seattle, WAHalf Marathons in Everett, WAHalf Marathons in Spokane, WAHalf Marathons in Olympia, WAHalf Marathons in Puyallup, WAHalf Marathons in Camas, WAHalf Marathons in Pasco, WAHalf Marathons in Richland, WAHalf Marathons in Redmond, WAHalf Marathons in Woodinville, WA

Other distances in Greater Seattle

5Ks in Greater Seattle10Ks in Greater SeattleMarathons in Greater Seattle