-
2026 Monster Mash 5K
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…
Saturday, October 24, 2026 10:00 am – 12:00 pm 2026 Monster Mash 5K
Lake Sammamish Boat Launch
4455 East Lake Sammamish Pkwy SE
Issaquah, WA