Monster Mash 5K - Issaquah
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About the race
Issaquah Schools Foundation Monster Mash 5K is a community fundraising event held on October 24, 2026, at 4455 E Lake Sammamish Pkwy SE, Issaquah, WA. The event raises funds for programs that serve students attending all 27 Issaquah School District schools.
The event offers both in-person and virtual 5K options. Early-bird registration options are listed at $35; some entries include a technical race tee and medal, one in-person option is listed without a t-shirt, and virtual entries note tee and medal pick-up at ISF. Registrations submitted by October 11 may opt to receive the 2026 Monster Mash technical race tee and medal.
The course is described as flat, paved, and out-and-back, with professional chip timing and phased start times. Onsite parking is available. Festive costumes are encouraged. Registered participants receive free event photos and raffle tickets for prizes. Placement awards will be presented for the fastest finishing times.
Information about specific start waves or exact race start times is not included here. Visit the organization's website for the most recent information.
