Some December races are about the time. Most aren’t.
The festive end of Denver’s calendar is full of fun runs. They’re costumed, untimed or barely timed, and short enough that the whole family can do them. They’re far more about the morning than the result.
If you’ve never raced before, a December fun run is one of the gentlest ways to start. No pressure, a lot of company, and usually a hot drink waiting.
What makes a fun run different
A fun run trades the stopwatch for the atmosphere. That changes who shows up and how it feels.
You’ll see strollers, dogs, kids in elf hats, and plenty of people walking stretches of it.
Nobody is chasing a personal best, which takes the edge off if you’re nervous about being slow.
A good first 5K is one you show up trained enough to enjoy, not one you survive.
Many of these events stack a few distances so there’s something for everyone in one morning.
- A 1-mile or kids’ run for families and first-timers.
- A 5K as the main event.
- Sometimes a 10K or a “doubles” option for people who want to run more than one.
The short-distance, family angle
The one-mile is the unsung hero of December racing.
It’s long enough to feel like a real event and short enough that a child, a beginner, or someone walking can finish it comfortably.
Treat the mile as a feature, not a consolation. It’s how a lot of people get their first race-day morning without committing to a 5K in the cold.
If you’re bringing kids, look for an event with a dedicated kids’ run so they’re not lining up with the faster 5K crowd.
Dressing for festive cold
You’ll be moving slower than in a goal race, which means you’ll feel the cold more, not less.
Costumes are half the fun, but build them over warm layers, not instead of them. A Santa suit looks great and breathes terribly.
Plan for that.
Gloves and a hat still matter even when you’re not racing hard.
A note on Scramblin’ Scrooge
Denver’s festive racing has real history. In the late 2010s, Scramblin’ Scrooge ran a 1-mile, 5K, 10K and a doubles option in City Park each December.
It was one of the seasonal runs once organized on this domain, and it isn’t held anymore.
Its mix is still the template for a good December event.
Pick your distance, wear something silly and warm, and treat it as a morning out rather than a test.
A family pick for December 2026
This year’s clearest example of that stacked format is Jingle Bell Run Colorado, on Sunday, December 13, in Washington Park.
Its race page lists a timed 5K, a 1-mile and a kids’ run, all at 8 a.m. One family can split across the distances and still share the same morning. Details are on the Jingle Bell Run Colorado page.
If you’d rather walk the whole way, try the Rudolph Ramble on Sunday, December 6. It’s billed as a 5K run or walk, with a 9 a.m. start in City Park.
Its theme is a search party for a missing reindeer, so the silly-and-warm rule applies. Details are on the Rudolph Ramble race page.
Finding the rest of this year’s fun runs
Festive runs come and go and change dates yearly. For everything else on this December, check a current Colorado race calendar like Colorado Runner.
For the racing side of the holidays and the cold-weather basics, see the Denver holiday and Christmas races guide. Or browse all the Front Range race guides by season.