🎃 4th Annual Monster Mash 5K & Creature Crawl 1K 👾
Join the Mid-Columbia Children's Museum for the 4th Annual Monster Mash 5K & Creature Crawl 1K, a family-friendly Halloween event bringing together costumes, movement, and hands-on fun in support of the future Mid-Columbia Children's Museum.
Whether you're running the 5K, walking with friends, or cheering on your little monster in the Creature Crawl, there's something for everyone!
📅 Saturday, October 24, 2026
📍 Howard Amon Park | Richland, WA
What to Expect
🏃 Costume-friendly 5K run/walk
👾 Creature Crawl 1K for kids and families
🔬 STEM-inspired activities
🍂 Family-friendly fall fun
❤️ Support the future Mid-Columbia Children's Museum
🎟️ Registration
Registration opens at 9:00 AM on September 1, 2026!
Register early and join us for one of our favorite family events of the year. Early registration ends October 1st!
💙 Foster & Kinship Families
Discounted registration is available for foster and kinship families. To receive a special registration code, please reach out to us at info@mccmuseum.org.
We want Monster Mash to be an event all families in our community can enjoy! 🎃👾
Race Day Rules
🎃 Costumes encouraged — keep them safe to run or walk in!
👶 Strollers welcome — please start toward the back.
🐾 Please leave pets at home (service animals welcome).
👾 Keep little monsters supervised.
➡️ Stay on the marked course and follow volunteer directions.
❤️ Be kind, have fun, and cheer each other on!
Additional race-day details, including check-in and start times, will be shared closer to the event.
We can't wait to celebrate another year of community, creativity, curiosity, and fun with you!
