Monsters & Mimosas 5K - Diamond Lake
Typically 38–58°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2025
35–49°F
dry
2024
41–73°F
dry
2023
40–53°F
rain
2022
47–71°F
dry
2021
44–68°F
dry
2020
46–73°F
dry
2019
31–41°F
dry
2018
44–56°F
rain
2017
28–49°F
dry
2016
30–43°F
rain
Best months to race in Oregon →
About this race
Get ready for a spooky-good time at the Monsters & Mimosas 5K, where Halloween fun meets festive celebration! This spirited run invites ghosts, goblins, and costumed creatures of all kinds to hit the course for a frightfully fantastic fall morning.
Join us at Diamond Lake Resort where all race participants will receive a custom finisher medal, a race-themed shirt, and a refreshing mimosa waiting for them at the finish line—because even monsters deserve a little sparkle after a solid run! We'll have juice and water for those under 21.
We’ll also be recognizing top finishers with awards in the usual five-year age groups starting at 10 & under, giving everyone a chance to show off their speed along with their costumes.
Join us for miles, mimosas, and a whole lot of Halloween magic!
Course map
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