In 89 days · Sat, Oct 24, 2026
Don't let race day sneak up
One email during race week. That's it.
When
Saturday, October 24th, 2026
Where
Howard Amon Park at the Finger Nail, Richland WA
Distances
5K
Typical weather
43–61°F · low rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2025
45–65°F
dry
2024
37–57°F
dry
2023
40–54°F
rain
2022
46–58°F
dry
2021
44–61°F
rain
2020
32–44°F
dry
2019
37–66°F
dry
2018
49–63°F
dry
2017
43–61°F
dry
2016
48–69°F
dry
Best months to race in Washington →
About this race
4th Annual Monster Mash 5K & Creature Crawl 1K
Save the Date: October 24, 2026
Join the Mid-Columbia Children's Museum for Monster Mash 5K & Creature Crawl 1K, a family-friendly Halloween event that brings 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.
Event Details
- Date: Saturday, October 24, 2026
- Location: 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: for the future Mid-Columbia Children's Museum
Registration Coming Soon
Registration will open later this summer. For now, save the date, spread the word, and start thinking about your costume!
We look forward to celebrating another year of community, creativity, curiosity, and fun with you.
Sponsorship Opportunities
Interested in reaching local families while supporting hands-on learning in our community? Sponsorship opportunities for the 2026 Monster Mash 5K & Creature Crawl 1K are now available.
To learn more about sponsorship levels and benefits, please contact fundraising@mccmuseum.org.
For more information, visit the event page: MCCM Monster Mash 5K & Creature Crawl 1K.
Course map
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