In 136 days · Sat, Dec 19, 2026
Don't let race day sneak up
One email during race week. That's it.
Saturday, December 19th, 2026
4616 S. Shields Street, Fort Collins CO
5K · 1 Mile
22–42°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
28–65°F
dry
2024
33–51°F
dry
2023
25–58°F
dry
2022
15–45°F
dry
2021
22–47°F
dry
2020
13–34°F
dry
2019
24–36°F
dry
2018
31–45°F
dry
2017
29–43°F
dry
2016
-6–34°F
dry
Best months to race in Colorado →
About this race
Event Overview
Calling all Ugly Sweaters… We want to see your most hideous, outrageous, bulky and unforgettable UGLY sweater running the Sweaty Sweater Race.
Participation Options
- Inclusive Event: This is an event for everyone, whether you are walking with friends, running for an award or even prancing towards the finish line for hot chocolate.
- Fun Experience: Don’t miss the FUN, sign up NOW!
Event Details
- Date: 2026-12-19
- Location: 4616 S. Shields Street, Fort Collins, CO
- Registration Link: Sign Up Here
Course map
Train with a club
Run clubs near Fort Collins to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.