Monster Mash 5K - Issaquah
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Issaquah Schools Foundation Monster Mash 5K
The Issaquah Schools Foundation Monster Mash 5K is a community-based, family-friendly running event held in Issaquah, Washington at 4455 E Lake Sammamish Pkwy SE. The event raises funds for programs that serve students attending all 27 Issaquah School District schools.
The event offers in-person and virtual 5K options. Onsite features include convenient parking, phased start times, a professionally chip-timed course, and a flat, paved out-and-back route. Costumes are encouraged. Registrants are eligible for placement awards, receive free event photos, and receive raffle tickets for prizes.
Registration information and fees are set by the organizer. Registration opens on September 8, 2026 and closes on September 19, 2026. The standard registration fee is $35.00 for listed options. Registrations submitted by October 11 receive the option to receive a 2026 Monster Mash technical race tee and medal; a No-Shirt registration option is available so a larger portion of the fee supports students. For the virtual option, pick-up at the Issaquah Schools Foundation is required for the tee and medal when those items are included. Visit the organization's website for the most recent information.
