Found 252 races

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OCT
11

Snohomish, WA
• 83.3 miles
$50 -$115
Snohomish River Run – Sunday, October 11th Experience the magic of fall in the Pacific Northwest at the Snohomish River Run—where crisp autumn air, vibrant colors, and scenic river views come...
5K 10K Half Marathon Marathon
10
OCT
17

Richland, WA
• 91.3 miles
$15
The Bethlehem Lutheran Fall Fest was started in 2000 by a group of parents, teachers, and school supporters. It is the main fundraising event for Bethlehem Lutheran School. Fall Fest has quickly...
5K
38
OCT
17

Kirkland, WA
• 80.2 miles
$52 -$98
The Lake Washington Half marathon is a beautiful loop course that starts and finishes and Juanita Beach Park in Kirkland. See more details on the website here!  Earn the  R-Pod medal when you...
Half Marathon
44
OCT
17

Seattle, WA
• 82.8 miles
$30 -$45
Get excited for the 4th annual Where's Bigfoot 5k. Big·foot. /ˈbiɡfo͝ot/. noun 1.a large, hairy, ape-like creature resembling a yeti, supposedly found in northwestern America. Visit our FAQs:...
5K
42
OCT
18

Seattle, WA
• 82.2 miles
$10 -$65
Run with the pack. Show your Purple Pride. Support UW students! Hit the road, Huskies! Lace up your sneakers and soak in the campus beauty for our annual 10K run and 5K run/walk. All Dawgs (and...
5K 10K
23
OCT
18

Seattle, WA
• 84.2 miles
$20 -$75
I can and I will is the mantra Olivia and her mom, Alisa, have been saying since 2018. Whether it's prepping to be poked by a needle or running up a big hill, we remind ourselves that we can and...
1m 5K 10K
16
OCT
24

Seattle, WA
• 84.2 miles
$35 -$55
October 24th, 2026 The Green Lake 5K & Wellness Festival Get ready for the ultimate blend of movement, community, and good vibes at the Green Lake 5K & Wellness Festival! This one-of-a-kind event...
5K
3
OCT
24

Issaquah, WA
• 69.2 miles
$35 -$45
Help us raise a MONSTROUS amount of support for local students on October 24th! ISF Monster Mash 5K is a community-based, family-friendly event that raises funds for programs that serve students...
5K
5
OCT
24

Sammamish, WA
• 69.3 miles
Join us for the Sammamish City Marathon. New Course! Starting at Sammamish City Center (City Hall) running down the streets of Sammamish into the quaint neighborhoods for the home town feeling,...
2m 5K 10K Marathon
5
OCT
24

Seattle, WA
• 83.2 miles
$20 -$45
This race is a costumed 5k trail run/walk and Kids Dash to support South Seattle College Cooperative Preschools.  Paid registration includes a t-shirt (all races) and bib with timing chip (5K...
5K
9
OCT
25

Seattle, WA
• 17.8 miles
$40 -$65
Earn your candy at the 18th annual Run Scared, benefiting Blood Cancer United (formerly The Leukemia and Lymphoma Society) Choose from 10K, 5K or 2 mile walk or run.    Celebrate Halloween with a...
2m 5K 10K
35
OCT
25

Richland, WA
• 91.8 miles
$25 -$200
The 43rd Annual Tri-Cities Marathon & Relay will be held Sunday, October 25, 2026!   Remembering Richard "Keith" Fuller. 1957-2025 1980 Tri-Cities Marathon Champion   Join us at the Riverfront...
5K Half Marathon Marathon
77
OCT
28

Black Diamond, WA
• 15.8 miles
Join the Club! PLEASE READ ALL OF THIS Ghosts are running amuck in Ten Trails!!! Do you and your team of Ghost Chasers have what it takes to capture and return the ghosts to their resting place a...
7
OCT
31

Bellevue, WA
• 16.1 miles
$40 -$100
Welcome to the 2025 edition of the Cougar Mountain Trail Run Series, put on by Seattle Running Club and Northwest Trail Runs. Our events support King County Parks, with a portion of every entry...
5K 7m 19m 50K
11
OCT
31

Puyallup, WA
• 30.8 miles
$35 -$50
We’re back from the beyond for the Haunted Hustle 5K & 10K Run/Walk—a fun, costume-themed, non-timed, and family-friendly Halloween tradition! Come dressed for fun, grab your friends, and kick...
5K 10K
8
OCT
31

Oak Harbor, WA
• 65.2 miles
$30 -$120
Swing the Gates is back for a 4th year! And this time we are CLOSING the Park on Halloween! This year will include the popular 10k Team Scavenger Hunt and the classic 5k Fun Run-costumes...
5K 10K
15
OCT
31

Seattle, WA
• 23.8 miles
$30 -$43
Annual Trick or Treat 5k!  Join us for a spooktacular time at the Trick or Treat 5k ! Lace up your running shoes and get ready for a ghoulishly fun event at Green Lake Park . Whether you're a...
5K
36
OCT
31

Tacoma, WA
• 32.0 miles
$15 -$77
Continuing the Halloween 5K tradition here in Tacoma we have added a 10k distance to the event! The Wicked Fast 5K & 10k registration will include t-shirts and Halloween themed medals that are...
1K 5K 10K
3
NOV
8

University Place, WA
• 37.4 miles
$43 -$93
Loops will be an incredibly enjoyable experience while simultaneously basking in the breathtaking panoramic views of the magnificent Bay! This sensational running trail allows participants to...
5K 10K Half Marathon
43
NOV
14

Richland, WA
• 90.8 miles
$10 -$25
The 51st Columbia River Classic 10Mile & 2 Mile Run Presented by:  3 Rivers Road Runners Sponsored by: FotoRuby, Atomic Ale, Eastern Oregon timing, SunWest Sportswear   Races:  We have a 2-mile...
2m 10m
32