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Monster Mash 5K

Help Us Raise a Monstrous Amount of Support for Students!

October 26, 2024 - 10 AM


Race Registration Opens in September 2024!

Hosted on the paved East Lake Sammamish Trail along the East side of Lake Sammamish, 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 Support & Enrichment, Behavioral & Mental Health, Basic Student Needs, Teacher Grants, Dedicated Fine Arts, and Cultural Bridges.

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!

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

Register by 10/7/24 to Guarantee your 2024 MM5K Medal and Shirt

2023 MM5K Race Photos


Click on download icon in SmugMug to start FREE download of photo

Special Thanks to & Photo Credit: Lens of Youth

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:

Avoid the lines on race day by picking up your packet early! To avoid elementary school bus traffic in the area, Early Packet Pickup is available on Friday, Oct. 27th any time between 4-7 pm at the Issaquah Schools Foundation located at 4225 West Lake Sammamish Pkwy SE, 98008. Limited parking in front of the building, additional overflow parking next door at Sunset Elementary. OK to pick up additional packets for friends and family.

*Packets include: timing bib, medal, tee (if you registered by 10/10) and pre-purchased Discover Passes.


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)








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