In 131 days · Sat, Oct 24, 2026
When
Saturday, October 24th, 2026
Where
4455 E Lake Sammamish Pkwy SE, Issaquah WA
Distance
5K
About this race
Event Details
- Date: October 24, 2026
- Location: 4455 E Lake Sammamish Pkwy SE, Issaquah, WA
- Race URL: Registration Link
About the Monster Mash 5K
- Objective: Help raise a MONSTROUS amount of support for local students!
- Community Event: A family-friendly event aimed at raising funds for programs that serve students attending all 27 ISD schools.
- Inclusivity: We welcome participants of all ages and abilities.
- Experience: Enjoy convenient onsite parking, phased start times, and a professionally chip-timed course!
Course Details
- Route: A flat, paved, out-and-back course perfect for setting a new 5K PR or a family walk.
- Costumes: Bring your creativity – festive costumes are encouraged!
Registration Information
- Deadline: Register by October 12th to receive a 2026 Monster Mash technical race tee & medal.
- Inclusions: Registrants receive free event photos and raffle tickets for prizes.
- Awards: Placement awards for the fastest finishing times will be presented.
- Selling Out: This event sells out every year, so don’t wait to register!
Course map
Train with a club
Run clubs near Issaquah to train with before race day.
See all run clubs near Issaquah →
Suggested Races
Organize this race?
Claim it free to manage the listing. Want more signups? Feature it to put it in front of more runners.