Event details subject to change. Please confirm all information via event website.
Week of Events
Sunday, November 30, 2025
No events on this day.
Monday, December 1, 2025
No events on this day.
Tuesday, December 2, 2025
No events on this day.
Wednesday, December 3, 2025
No events on this day.
Thursday, December 4, 2025
No events on this day.
Friday, December 5, 2025
No events on this day.
Saturday, December 6, 2025
-
December 6, 2025 -Thumbs Up Vertical Challenge
-
December 6, 2025 -PPRR Nielson Challenge
-
December 6, 2025 -Sweaty Sweater 5K
-
December 6, 2025 -Chasing Santa 5K
-
December 6, 2025 -Catfish Flats
-
December 6, 2025 -Ugly Sweater 5K
-
December 6, 2025 -Jingle Jog 5K
-
December 6, 2025 -Onesie Dash
-
December 6, 2025 -Race Of The Santas 1M
Thumbs Up Vertical Challenge
Rules Beginning at 8am, runners will ascend the Thumb Open Space out and back trail, each lap is 2km with 540ft of vertical gain At the turnaround runners collect 1 poker chip to bring back to the start and deposit in their jar Turn around and climb again Uphill runners yield to downhill At 4pm, […]
PPRR Nielson Challenge
Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]
Sweaty Sweater 5K
5k Run/Walk – 9:00 am Kid’s 1-Mile – 10:00 am Calling all Ugly Sweaters… We want to see your most hideous, outrageous, bulky and unforgettable UGLY sweater running the Sweaty Sweater Race. This is an event for everyone, whether you are walking with friends, running for an award or even prancing towards the finish line […]
Chasing Santa 5K
Celebrate Christmas with a 5k Run/Walk. This holiday event is designed for the whole family. Instead of your race day "T" shirt, you will receive a complete Santa Suit, Pants, Jacket, Belt, Hat and of course a Beard, yours to keep.
Catfish Flats
We host one race per month from November to March. All races are at Chatfield State Park and start at 9:00 am on Saturday mornings. Check-in starts at 8:15 am.
Ugly Sweater 5K
Join us for The Ugly Sweater 5k on December 6, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Longmont. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Wear your best ugly sweater […]
Jingle Jog 5K
Jingle Jog is a fun run event to support Mountain Tots fundraising goals. The event will include a 1K kids fun run and 5K route option for participants. Starting in historic downtown and the same day as Christmas on Broadway this race will be joy to all young and old and is a fantastic way […]
Onesie Dash
Enjoy a scenic little dash in and around Red Feather Lakes, Colorado! Wear your favorite onesie (and layer it underneath if you need extra warmth!). Start at The Tavern at Red Feather Lakes and end back at The Tavern for a hot cocoa and s'mores bar and then we'll all walk into town (3 min […]
Race Of The Santas 1M
Start the winter festivities in Breckenridge by lacing up your running shoes for the RACE OF THE SANTAS! The race kicks off on Main Street directly in front of the Canteen Tap House (208 N. Main Street) and finishes in Blue River Plaza just in time for the Lighting of Breckenridge. The first 700 registrants receive a commemorative socks with registration. […]
Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.