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Monster Mash 5K

Monster Mash 5K 2022

 October 29, 2022 – 10am
Lake Sammamish State Park Boat Launch/East Lake Sammamish Trail

register now!

Help Us Raise a Monstrous Amount of Support for Local Students!

Join us Saturday, October 29th, 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. (See route preview). 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!   

Share Our Monster Mash 5K Facebook Event with Others Now!

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

All registrations by received by October 9, 2022 include a 2022 MM5K technical tee & medal

Additional Awards for:

Overall 1st, 2nd, and 3rd Place (Male/Female categories)

Age Category Winners for:

Under 10, 10-14, 15-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70+  

Early Packet Pickup:

October 28, 2022 from 4pm – 7pm. Location TBA.  

Route Info

Video Coming Soon!

Start/Finish Line

Packet Pick-Up/Onsite Parking:

West Lake Sammamish State Park Boat Launch

4455 E Lake Sammamish Pkwy SE, Issaquah, WA 98029

5K Route:

East Lake Sammamish Trail (Click on image for preview)

View MM5K 2021 Photo Gallery


Thank You to our Sponsors!




Hilton Garden Inn - Issaquah        Issaquah Family Chiropractic
Jennifer McGeary, Penrith Home Loans – NWMLS#106496
Kumon Math and Reading Center of Issaquah - Highlands
Mindful Connections Coaching, LLC      Sara Miller Group - Windermere

100% of all proceeds go to support local students via the Issaquah Schools Foundation.





As a community-powered non-profit organization, we value and welcome your involvement. Your donation of time and talent will directly impact the quality of education our students receive.

Fueling Success for Every Student, Every School