Monster Mash 5K 2022 is officially SOLD OUT! Thank you to everyone who registered!

It’s time 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!

Set a new training goal for yourself, beat the weekend sugar rush, or simply embrace the festive season with friends outdoors while raising funds for local students. Proceeds from the Monster Mash 5K help provide programs and resources for local students in the areas of Academic Success, Mental Health, Basic Student Needs, Community Outreach, and Enrichment.

Warm up lakeside before blasting off from the back row of the parking lot onto the fast, flat, paved East Lake Sammamish Trail. 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.

All participants arriving in festive seasonal wear will be entered into a raffle for gift cards to local restaurants and stores, so get creative and dress to impress!   

Invite your friends and family to join in on the fun! Share our Facebook Event page to encourage others to participate! 

Registrations by received by October 9 include a 2022 MM5K technical tee & medal

For more information and to register, visit Monster Mash 5K (isfdn.org)