Is January a good month for an Ultra?
January sits in the middle of the year for the Ultra, carrying 18 against 37 in April and 7 in July. Enough to choose from, and easier to get into than the races at the peak of the season.
Race calendar · January 2027
Ultramarathons in January 2027
18 ultramarathons across the US in January 2027, sorted by date. Which weekends are busiest, what the fields actually run, entry fees, and where each one starts.
January ultras in the United States are a winter specialty. The northern states bring cold air, short days, and potentially icy or snow-covered footing, while the South and Southwest offer mild enough conditions to race long without fighting frozen trails. Knowing which environment you want is the first decision to make.
The calendar stretches from coastal island loops and desert crossings to endurance formats that simply ignore the weather by running in circles through the night. Some events double as New Year kickoffs; others are quiet tune-ups for runners rebuilding after the holidays before a spring goal.
January also sits in an awkward spot in the training year. Most runners are coming off disrupted holiday weeks, not a peak block, so honest fitness assessment matters more than usual before committing to a long effort. If the goal race is spring, a January ultra can serve as a long stimulus rather than an all-out result.
What the field actually runs
January Ultramarathons, By the Numbers
7:23:20Median finish time
4:14:46Median winning time
83Median field size
8January ultramarathons 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 Nov 12, 2026.
When in January
The January Race Weekends
Ultramarathons are not spread evenly across January. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
By the numbers
The Biggest Field
The largest field of any January Ultra, from the most recent published results.
January Ultramarathons by State
Ultra Marathons by City in January
The Next Ultra Marathons in January
18 total Fri, Jan 1, 2027Badwater 267 VR Death Valley, CAFrom $99Details Fri, Jan 1, 2027Raven Resolution Challenge Anchorage, AKRegistration opens Nov 27From $75Details Fri, Jan 1, 2027Canyon of the Eagles New Year's Trail Challenge · 100K & 50K ULTRA, Marathon, 13.1M Run & Ruck, 10K, 5K Burnet, TXFrom $160Details Thu, Jan 7, 20272027 Walt Disney World® Marathon Weekend Kissimmee, FLFrom $495Details Thu, Jan 7, 20272027 WALT DISNEY WORLD® Marathon Weekend Orlando, FLFrom $75Details Sat, Jan 9, 2027Frosty Fifty Trail Races 5K Winston Salem, NCFrom $40Details Sat, Jan 9, 2027Fleet Feet Four Season Challenge Rochester, NYFrom $65Details Sat, Jan 9, 2027Frozen Sasquatch Trail 50k/25k Charleston, WVFrom $80Details Sat, Jan 9, 2027Avalon Benefit 50 Mile/50K Run Avalon, CAFrom $165Details Sat, Jan 9, 2027Memory Lane 30 Hour Endurance Run (Bell Lap) Anderson, SCPricing TBADetails Sat, Jan 9, 2027San Diego 50 & Trail Runs Escondido, CAFrom $165Details Sat, Jan 16, 2027RUN JEKYLL Jekyll Island, GAFrom $235Details
Common Questions About Running a January Ultra
What should I wear for a January ultra in the US?
That depends entirely on where you are racing. A coastal California or Gulf Coast ultra might need only a light layer at the dawn start. A Midwest or Appalachian event can demand wind-resistant shells, waterproof shoes, and gloves that work wet. Check the forecast within a week of race day and build a drop-bag plan for temperature swings across many hours.
Are January ultras a good choice for runners targeting a spring race?
Yes, if you treat the effort honestly. A January ultra fits best as a high-mileage stimulus rather than a race-to-the-finish effort. Running controlled through a long course builds the aerobic base a spring goal needs without the recovery debt of a full red-line attempt. Plan extra recovery time before resuming structured training.
How do I pick a January ultra based on weather risk?
Start with geography. California and Florida events carry the lowest cold and ice risk. Southeast coastal races are typically runnable but can turn windy. Anything in the Appalachians, Midwest, or high elevation carries real winter exposure risk. Timed loop and road formats let you bail a loop earlier than a point-to-point course if conditions turn.
How far ahead should I start training to be ready for a January ultra?
A full summer and fall of consistent base building is the realistic runway for most runners. If you are coming off a fall marathon, a shorter conversion block can work, but January gives you almost no time to fix a fitness gap that opened during holiday disruption. Starting a dedicated build no later than September gives the best margin.
When in January are most ultramarathons held?
The busiest weekend is January 9 and January 10, with 6 of them. Another 6 fall on a weekday, which is worth knowing if you are traveling for one.
What is a good Ultra time?
Across the 8 of these January ultramarathons with published results from past editions, the median finisher ran 7:23:20, and the median winning time was 4:14:46. So anything under 7:23:20 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 Ultra field?
The median one finished 83 runners, across the 8 of these January ultramarathons 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 8:57:00.
Are there trail ultramarathons in January?
Yes, 6 races around the United States get you off the pavement: 6 are trail races.