When in January are most 10K races held?
The busiest weekend in Colorado is January 30 and January 31, with 4 10K races on those two days, and the single busiest day is Saturday, January 30 with 3. Every one of them is on a Saturday or a Sunday.
Race calendar · January 2027 · Colorado
January 2027 10K Races in Colorado
Every 10K in Colorado in January 2027, all 11 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
11 10K races in January 2027
What the field actually runs
January 10K Races, By the Numbers
1:04:17Median finish time
41:14Median winning time
79Median field size
3January 10K races with published results
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Sep 22, 2026.
When in January
The January Race Weekends
10K races do not spread evenly across January. The busiest weekend is January 30 and January 31, with 4 of them.
By the numbers
The Biggest and Longest-Running
The January 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
January 10K Races by City
Soonest 10K Races in January
11 total Sat, Jan 9, 2027Winter Series - The Coolest Race in Town! Colorado Springs, CORegistration opens Oct 4From $40Details Sat, Jan 9, 2027All-Out Polar Prowl Arvada, COFrom $40Details Sat, Jan 16, 2027MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sat, Jan 16, 2027Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sun, Jan 17, 2027Colorado Cold Snap Louisville, COFrom $39Details Sat, Jan 23, 2027Chilly Willy 5K/10K/Half Marathon - Colorado Springs Colorado Springs, COFrom $30Details Sun, Jan 24, 2027Yeti Chase 5k/10k Morrison, COFrom $25Details Sat, Jan 30, 2027Time Travel Half-Marathon/5K/10K - Denver Denver, COFrom $20Details Sat, Jan 30, 2027Coffee Lover Run DENVER/AURORA Centennial, COFrom $30Register Sat, Jan 30, 2027Run for Donut DENVER/AURORA Centennial, COFrom $30Register Sun, Jan 31, 2027Time Travel Half-Marathon/5K/10K - Colorado Springs Colorado Springs, COFrom $25Details
Common Questions About Running a January 10K in Colorado
When should I sign up for a January 10K?
As early as you can. 3 of these January 10K races already have a price increase on the calendar, and 10 are open for entry right now. Another 1 have published an opening date and have not opened yet.
How much does a January 10K cost to enter?
The typical entry is $30, with paid entries running from $20 up to $40. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
What is a good 10K time?
Across the 3 of these January 10K races with published results from past editions, the median finisher ran 1:04:17, and the median winning time was 41:14. So anything under 1:04:17 puts you in the faster half of a typical field. That is the middle of these RunSignup fields, walkers and charity entrants included, not a national average.
How big is a typical January 10K field?
The median one finished 79 runners, across the 3 of these January 10K races with published results from past editions. Most are far smaller than the big-city events people picture, which means less crowding at the start and a friendlier field, with a last recorded finisher at 1:41:47.
10K Races in Other Months
December and February sit either side of January, which is where most people look next when a date does not fit.