Issaquah Schools Foundation Monster Mash 5K
- Date
- October 24, 2026
- Distance
- In-Person 5K · Virtual 5K
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.
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
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Frequently Asked Questions (FAQs)
- What is the Issaquah Schools Foundation Monster Mash 5K?
- Issaquah Schools Foundation Monster Mash 5K is a running event held in Issaquah, WA. Learn more about the different endurance sports here.
- When and where is the Issaquah Schools Foundation Monster Mash 5K?
- Saturday, October 24, 2026 in Issaquah, WA at 4455 E Lake Sammamish Pkwy SE, Issaquah, WA. Check the official event page for exact start times and wave schedules.
- How do I register for the Issaquah Schools Foundation Monster Mash 5K?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
Issaquah Schools Foundation Monster Mash 5K
Oct 24, 2026