Race calendar · October 2026
49 marathons across the US in October 2026, sorted by date. Which weekends are busiest, what the fields actually run, entry fees, and where each one starts.
October is the heart of US marathon season. Temperatures across much of the country have finally dropped to the point where a 26.2 feels manageable rather than punishing, and daylight at race start is reliable enough that you will not be running the first miles in darkness.
Conditions vary sharply by region, though. The Northeast and upper Midwest are into crisp, fast-feeling mornings, the Southeast can still feel warm and humid well into the month, and mountain venues bring cold starts and the chance of early snow. Choosing a race means choosing a climate.
Because October draws so many runners, popular races here can fill fast. If you have a specific city or course style in mind, waiting until the week before registration closes is a risk. Build in time to decide and commit early.
What the field actually runs
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 Oct 16, 2026.
When in October
Marathons are not spread evenly across October. 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 largest field of any October Marathon, from the most recent published results.
It is one of the busier months. October carries 49 Marathon races, against 69 in November, which is the fullest month of the year. There is a real choice of dates here, with less competition for entries than the peak of the season.
Expect wide variation depending on where you race. Northern and mountain venues can be cold at the gun, with temperatures that reward gloves and throwaway layers. Coastal and southern venues are often still warm enough to demand heat-management pacing. No single weather assumption holds across the whole month.
In the Northeast or upper Midwest, plan for a cold start and a warmer mid-race, so a lightweight outer layer you can shed or tie off is worth carrying. In the South or Southwest, treat it like a warm-weather race even in October. Check the forecast for your specific city in the days before, not just the regional average.
October is the strongest argument for destination racing at 26.2. The calendar is wide enough to match a course style and a climate to what you actually want. A flat river-road course in the Mid-Atlantic, a mountain trail in Colorado, a coastal route in the Pacific Northwest - all are live options in the same month.
A standard marathon build runs roughly sixteen weeks, which points to a late-June start for an early-October race. That puts the hardest long-run weeks in summer heat, so building base fitness in spring before the formal plan begins gives you real protection against those August and September training miles.
The busiest weekend is October 17 and October 18, with 21 of them, 14 of those on Saturday, October 17. Every one of them is on a Saturday or a Sunday.
Across the 18 of these October marathons with published results from past editions, the median finisher ran 4:30:19, and the median winning time was 2:59:51. So anything under 4:30:19 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.
The median one finished 136 runners, across the 18 of these October 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 7:12:06.
North Carolina has 5, Ohio has 5, Virginia has 5, Maryland has 4, Texas has 4. If you are willing to travel, those are the states where an October weekend gives you the most to choose from.
Yes, 5 races around the United States get you off the pavement: 4 are trail races, and 1 mixes road and trail.
