Issaquah Schools Foundation Monster Mash 5K
Sat, Oct 24, 2026, 10:00 AM PDT
- Location
- Issaquah, WA
- 4455 E Lake Sammamish Pkwy SE, 98029
- Type
- RUN
Sign up and verify details on the organizer’s official page.
Vibe analysis coming soon
Course feel, difficulty, and community fit are being added to this listing. Check back, and always confirm details on the official registration page.
Distances & registration
2 optionsRegistration for all distances is through the official signup link above.
- 5K
Sat, Oct 24, 10:00 AM PDT · From $39.80
Opens Sep 9, 2026, 8:00 PM PDT · Closes Oct 20, 2026, 7:59 AM PDT
- 5K
Sat, Oct 24, 10:00 AM PDT · From $39.80
Opens Sep 9, 2026, 8:00 PM PDT · Closes Oct 22, 2026, 7:59 PM PDT
The course
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From the organizer
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 attending all 27 ISD schools.
We welcome all-ages and abilities. Convenient onsite parking, phased start times, and a professionally chip-timed course ensure a great experience for all. You’ll appreciate the flat, paved, out-and-back route whether you’re setting a new 5K PR or enjoying a brisk walk together as a family! Bring your creativity – festive costumes are encouraged!
This event sells out every year, so don't wait to register! Every registration submitted by October 12th receives a 2026 Monster Mash technical race tee & medal. Registrants receive free event photos and raffle tickets for prizes as well! Placement awards for fastest finishing times will also be presented. See below for details.