United States
Oct
25
Saturday
Monster Mash 5K - Issaquah
The Monster Mash 5K is held in Issaquah, Washington, near Lake Sammamish. In-person 5K includes a T-shirt and medal; a medal-only option and a Virtual 5K with T-shirt and medal are also offered. Early packet pickup is Friday at the Issaquah Schools Foundation, with timing bib, medal, T-shirt (registered by cutoff), and Discover Passes.
Parking is at the Lake Sammamish Boat Launch near the start/finish, with Discover Pass requirements and overflow parking at the ISD Administration lot. Start/finish near the Lake Sammamish Boat Launch at 4455 E Lake Sammamish Pkwy SE, Issaquah; event on October 25, 2025. It is presented by the Issaquah Schools Foundation. Visit the organization's website for the most recent information.
Always double-check with the organizer's website – things can change, and we might have sprinted past a few details! This page may contain affiliate links.
5 km
5k (includes Medal Only)
5 km
5k (includes T-Shirt & Medal)
Virtual 5k (includes T-Shirt & Medal)
Virtual 5k
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