October 28, 2023
Lake Sammamish State Park
2010 N.W. Sammamish Road
Issaquah, WA 98027
Issaquah Schools Foundation "Monster Mash" 5K Fun Run
Saturday, October 28, 2023
Issaquah Schools Foundation 5k Monster Mash Run
5k Monster Mash Run 2023
Help Us Raise a Monstrous Amount of Support for Local Students! Join us Saturday, October 28th, for the Issaquah Schools Foundation Monster Mash 5K! Hosted at Lake Sammamish State Park Boat Launch and the East Lake Sammamish Trail, this professionally chip-timed 5K route is perfect for taking in the colors and spirit of fall!
Phased start waves are offered to welcome participants at all activity levels, whether you are an elite runner looking to PR, a fully costumed casual walker, or somewhere in between.
Free onsite parking is available near the Start/Finish line with a valid WA State Parks Discover Pass with free overflow parking about .75 mile away.