# Issaquah Schools Foundation Monster Mash 5K

- **When:** Fri, Oct 23, 2026 · 7:00 PM CDT
- **Where:** 4455 E Lake Sammamish Pkwy SE, Issaquah, WA, 98029
- **Event page:** https://runthis.run/event/rs-184211-issaquah-schools-foundation-monster-mash-5k

## Registration

Register on the event's own site: https://runsignup.com/Race/WA/Issaquah/MM5K?aflt_token=58wBqomPr6bPwa1YDhuKo0IQvrNCjzTq

## Description

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 11th receives the option of receiving a 2026 Monster Mash technical race tee & medal. Option to waive the shirt (No-Shirt Registration), if wearing monsters isn't your jam - more of your registration fee will go to support students! Registrants are eligible for placement awards, receive free event photos,  and raffle tickets for prizes! See below for details.

---

Source: [https://runthis.run/event/rs-184211-issaquah-schools-foundation-monster-mash-5k](https://runthis.run/event/rs-184211-issaquah-schools-foundation-monster-mash-5k) — data from Run This (runthis.run).