Issaquah Schools Foundation Monster Mash 5K

  • Date Sat 25th October 2025
  • Time 10:00AM PDT
  • Location Issaquah, Washington
  • Price $39.80 - $50.60
  • Races 6 races
  • Distances 5km

Event summary

Get ready for a spooktacular day of fun and fitness at the Issaquah Schools Foundation Monster Mash 5K on Saturday, October 25th, 2025, in beautiful Issaquah, King County! This family-friendly event invites participants of all ages and abilities to join in the excitement while supporting local students in all 27 Issaquah School District schools. The professionally chip-timed 5K features a flat, paved, out-and-back route that's perfect for both seasoned runners aiming for a personal best and families enjoying a leisurely walk together.

Dress up in your most creative costumes and embrace the festive spirit, as this beloved community event encourages participants to showcase their Halloween flair. With convenient onsite parking, phased start times, and a plethora of perks including free event photos, raffle tickets for prizes, and awards for top finishers in each age category, the Monster Mash 5K promises an unforgettable experience. Be sure to register by October 12th to secure your 2025 Monster Mash technical race tee and medal, as this event sells out every year. Don't miss out on being part of this incredible celebration of community and education!

Organiser's Description

HELP US RAISE A MONSTROUS AMOUNT OF SUPPORT FOR LOCAL STUDENTS ON OCTOBER 25TH! ISF MONSTER MASH 5K IS A COMMUNITY-BASED, FAMILY-FRIENDLY EVENT THAT RAISES FUNDS FOR PROGRAMS THAT SERVE STUDENTS ATTENDING ALL 27 ISD SCHOOLS. [https://isfdn.org/programs/funding-by-school/]

WE WELCOME ALL-AGES AND ABILITIES. CONVENIENT ONSITE PARKING, PHASED START TIMES, AND A PROFESSIONALLY CHIP-TIMED COURSE ENSURE A GREAT EXPERIENCE FOR ALL. YOULL APPRECIATE THE FLAT, PAVED, OUT-AND-BACK ROUTE WHETHER YOURE SETTING A NEW 5K PR OR ENJOYING A BRISK MORNING WALK TOGETHER AS A FAMILY! BRING YOUR CREATIVITY FESTIVE COSTUMES ARE ENCOURAGED!

THIS EVENT SELLS OUT EVERY YEAR, SO DON'T WAIT TO REGISTER! EVERY REGISTRATION SUBMITTED BY OCTOBER 12TH RECEIVES A 2025 MONSTER MASH TECHNICAL RACE TEE & MEDAL. REGISTRANTS RECEIVE FREE EVENT PHOTOS AND RAFFLE TICKETS FOR PRIZES AS WELL! PLACEMENT AWARDS FOR THE TOP THREE FINISHING TIMES BY AGE CATEGORY WILL ALSO BE PRESENTED.

Races

  • Earlybird 5K Registration

    Incl. $4.80 Fee & T-Shirt

    Sat 25th October 2025 (10:00AM PDT)

    $39.80

    OPENS 13 OCT
    Technical Race Tee & Medal Included
  • Earlybird Virtual 5K

    Incl. $4.80 Fee & T-Shirt

    $39.80

    OPENS 12 SEP
    Technical Race Tee & Medal Included. Pick-up at ISF required.
  • Standard 5K Registration

    Incl. $5.20 Fee & T-Shirt

    Sat 25th October 2025 (10:00AM PDT)

    $45.20

    OPENS 19 SEP
    Technical Race Tee & Medal Included for registrations submitted by 10/12/25.
  • Standard Virtual 5K Registration

    Incl. $5.20 Fee & T-Shirt

    $45.20

    OPENS 19 SEP
    Technical Race Tee & Medal Included for registrations submitted by 10/12/25. Pick-up at ISF.
  • Late 5K Registration (No Shirt)

    Incl. $5.60 Fee

    Sat 25th October 2025 (10:00AM PDT)

    $50.60

    OPENS 13 OCT
  • Late Virtual 5K Registration (No Shirt)

    Incl. $5.60 Fee

    $50.60

    OPENS 13 OCT

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Location

4455 E Lake Sammamish Pkwy SE, Issaquah, 98029, WA, United States

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