Half Marathon races in Seattle, WA

Looking for half marathons near you in Seattle, WA? There are 76 upcoming half marathons listed here. The next one is Galloping Gertie on Sat, Aug 1, 2026 at Tacoma Narrows Airport — see the full list below for dates, venues, and registration links, and browse half marathons in other cities.

All 5K (177) 10K (95) Half Marathon (76) Marathon (20) Trail Run (9)

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
Sun, Aug 2, 2026 Craft Classic Seattle 160 161st Ave NE · Redmond, WA · From $33 5KHalf Marathon Road
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
Sun, Aug 9, 2026 Tunnel Vision Marathon & Half Marathon NF-906, Hyak Dr E. · Snoqualmie Pass, WA 5K10KHalf MarathonMarathon 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
Sun, Aug 16, 2026 Twilight at the Bay Chambers Bay Loop Trail · University Place, WA · From $33 5K10KHalf Marathon Road
Sat, Aug 22, 2026 2026 Kirk-Wood Half Marathon 5520 108th Ave NE · Kirkland, WA · From $75 5KHalf Marathon 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
Sun, Aug 30, 2026 Iron Horse Half Marathon 1711 Boalch Ave NW · North Bend, WA · From $82 5KHalf Marathon Road
Sat, Sep 5, 2026 Medal Madness 5K, 10K, 13.1M & 26.2M at Everett, WA (36) 600 128th St SE · Everett, WA · From $30 5K10KHalf MarathonMarathon Road
Mon, Sep 7, 2026 Redmond Harvest Half Marathon Marymoor Park · Redmond, WA · From $59 5KHalf Marathon Road
Sat, Sep 12, 2026 Cascade Express Marathon & Half Marathon Homestead Valley Trailhead · North Bend, WA · From $119 5K10KHalf MarathonMarathon Road
Sat, Sep 12, 2026 National Chocolate Day: Run for Chocolates 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Sep 12, 2026 Run for Mental Health 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Sep 12, 2026 Medal Madness 5K, 10K, & 13.1M at Everett, WA (37) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Sep 12, 2026 Beat the Blerch Tolt-MacDonald Park · Carnation, WA · From $40 5K10KHalf MarathonMarathon Road
Sat, Sep 19, 2026 Fall - Mud Mountain Dam Marathon & Half Marathon 30525 S.E. Mud Mountain Rd. · Enumclaw, WA · From $70 5K10KHalf MarathonMarathon Road
Sat, Sep 19, 2026 The Brooks Orca Half Marathon presented by REI 1222 Harbor Ave SW · Seattle, WA · From $63 5KHalf Marathon Road
Sat, Sep 19, 2026 Medal Madness 5K, 10K & 13.1M at Everett, WA (38) 3505 Lowell Snohomish River Rd, · Everett, WA · From $30 5K10KHalf Marathon Road
Sun, Sep 20, 2026 Quilcene Oyster Races 151 E. Columbia St. · Quilcene, WA · From $25 5K10KHalf MarathonMarathon Road
Sat, Sep 26, 2026 Oktoberfest Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Sep 26, 2026 Run for Donuts 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sun, Sep 27, 2026 Puyallup Valley Half Marathon and 10K 1100 N Meridian Ave · Puyallup, WA · From $40 10KHalf Marathon Road
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
Sun, Oct 4, 2026 Poulsbo Half Marathon & 10k 18937 Front St NE · Poulsbo, WA · From $38 5K10KHalf Marathon 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 Haunted 5K, 10K, & 13.1M at Everett WA (41) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon 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
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 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, Nov 7, 2026 Gobbler 5K, 10K, & 13.1M at Everett, WA (45) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
Sun, Nov 8, 2026 Run the Bay Chambers Bay Loop Trail · University Place, WA · From $33 5K10KHalf Marathon Road
Sat, Nov 14, 2026 Run for Mental Health 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Nov 14, 2026 Veterans Day Freedom Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Nov 14, 2026 Gobbler 5K, 10K, & 13.1M at Everett, WA (46) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Nov 21, 2026 Gobbler 5K, 10K, & 13.1M at Everett, WA (47) 3505 Lowell Snohomish River Rd, · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Nov 28, 2026 2026 Seattle Ghost Marathon, Half & 50K 5018 Lake Washington Blvd. S · Seattle, WA · From $120 5K10KHalf MarathonMarathonTrail Run Trail
Sat, Nov 28, 2026 Coffee Lovers Run 5K/10K/13.1 SEATTLE Magnuson Park (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Nov 28, 2026 Thanksgiving Gobble Trot Run 5K/10K/13.1 SEATTLE Magnuson Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sun, Nov 29, 2026 UW Medicine Seattle Marathon and Half Marathon Seattle Half MarathonMarathon Road
Sun, Nov 29, 2026 2026 UW Medicine Seattle Marathon 5th & Harrison · Seattle, WA Half MarathonMarathon Road
Sun, Nov 29, 2026 2026 UW Medicine Seattle Half Marathon 5th & Harrison · Seattle, WA Half MarathonMarathon Road
Sat, Dec 5, 2026 Holiday 5K, 10K, & 13.1M at Everett, WA (49) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Dec 12, 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, Dec 12, 2026 Sunrise Marathon 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf MarathonMarathon Road
Sat, Dec 12, 2026 Santa Runs Tacoma Downtown Tacoma · From $35 5K10KHalf Marathon Road
Sat, Dec 12, 2026 Holiday 5K, 10K, & 13.1M at Everett, WA (50) 600 128th St SE · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Dec 19, 2026 Holiday 5K, 10K, & 13.1M at Everett, WA (51) 3505 Lowell Snohomish River Rd, · Everett, WA · From $30 5K10KHalf Marathon Road
Sat, Dec 26, 2026 A Merry Christmas Run 5K/10K/13.1 SEATTLE Magnuson Park (Course Maps emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Dec 26, 2026 New Year's Run 5K/10K/13.1 SEATTLE Magnuson Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Jan 16, 2027 MLK Jr. Freedom Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Jan 16, 2027 Sunrise Marathon 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf MarathonMarathon Road
Sat, Jan 30, 2027 Coffee Lover Run SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Jan 30, 2027 Run for Donut SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Feb 13, 2027 Run for Chocolate 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Feb 13, 2027 Valentine's Day Run 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Mar 6, 2027 Brooks Lake Sammamish Half Marathon presented by REI 15670 NE 85th St, Redmond, WA 98052 · From $68 5KHalf Marathon Road
Sun, Mar 7, 2027 2027 Woodinville Half and 10K 17301 131st Ave NE · Woodinville, WA · From $50 5K10KHalf Marathon Road
Sat, Mar 20, 2027 Sunrise Marathon 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf MarathonMarathon Road
Sat, Mar 27, 2027 2027 Mill Town Half Marathon, 10K and 5K 615 Millwright Lp W · Everett, WA · From $35 5K10KHalf Marathon Road
Sat, Apr 10, 2027 Run for Bagels 5K/10K/13.1 SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, Apr 24, 2027 Coffee Lover Run SEATTLE Lincoln Park (Course Map will be emailed) · Seattle, WA · From $30 5K10KHalf Marathon Road
Sat, May 1, 2027 Tacoma City Marathon / Half / Ghost / 10K / 5K / 1K Dune Peninsula Park · Tacoma, WA · From $10 5K10KHalf MarathonMarathon Road
Sun, May 2, 2027 Kirkland Half Marathon & 5K 9703 NE Juanita Drive · Kirkland, WA · From $12 5KHalf Marathon Road
Sun, May 23, 2027 2027 Evergreen Half and 5 Mile 400 2nd St, Snohomish, WA 98290 · From $45 5KHalf Marathon Road
Sat, Jun 12, 2027 Seattle Marathon Summer Events Seward Park · Seattle, WA 5K10KHalf MarathonMarathon Road

New to the distance? Read how long to train for a half marathon, or set your target with the pace chart.

Quick answers

When is the next half marathon in Seattle?

The next Half Marathon in Seattle, WA is Galloping Gertie on Sat, Aug 1, 2026 at Tacoma Narrows Airport.

How many half marathons are coming up near me in Seattle?

There are currently 76 upcoming half marathons listed in Seattle, WA, each with a date, venue, and direct registration link.

What's the cheapest Half Marathon in Seattle?

The lowest listed entry right now is Tacoma City Marathon / Half / Ghost / 10K / 5K / 1K at from $10. Registration prices usually rise as race day nears, so early entry is cheapest.