When in January are most half marathons held?
The busiest weekend in Michigan is January 9 and January 10, with 3 of them, 2 of those on Sunday, January 10. One more falls on a weekday, which is worth knowing if you are traveling for it.
Race calendar · January 2027 · Michigan
Half Marathons in Michigan in January 2027
Every Half Marathon in Michigan in January 2027, all 7 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
January Half Marathons, By the Numbers
2:10:19Median finish time
1:32:02Median winning time
25Median field size
5January half marathons 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
Half marathons 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 Half Marathon in Michigan, from the most recent published results.
Michigan Half Marathons by City in January
All Half Marathons in Michigan in January
7 total Sat, Jan 2, 2027New Year 5K, 10K, & 13.1M, Grand Ledge, MI (01) Grand Ledge, MIFrom $65Details Mon, Jan 4, 2027Team Running Lab Half / Full Marathon Training Group Brighton, MIFreeDetails Sat, Jan 9, 2027Time Travel Half-Marathon/5K/10K - Ann Arbor Ypsilanti, MIFrom $70Details Sun, Jan 10, 2027Time Travel Half-Marathon/5K/10K - Grand Rapids Grand Rapids, MIFrom $70Details Sun, Jan 10, 2027Time Travel Half-Marathon/5K/10K - Lansing Lansing, MIFrom $54Details Sat, Jan 16, 2027Medal Madness 5K, 10K, & 13.1M at Corunna, MI (03) Corunna, MIFrom $65Details Sat, Jan 23, 2027Viking 5K, 10K, 13.1M at Lansing, MI (04) Lansing, MIFrom $65Register
Common Questions About Running a January Half Marathon in Michigan
What is a good Half Marathon time?
Across the 5 of these January half marathons with published results from past editions, the median finisher ran 2:10:19, and the median winning time was 1:32:02. So anything under 2:10:19 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 Half Marathon field?
The median one finished 25 runners, across the 5 of these January half marathons 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 2:59:47.