
Greensboro, United States of America · Saturday 17 October 2026
Greensboro sits in the heart of North Carolina's Piedmont region, a landscape that strikes a nice balance between the flat coastal plains to the east and the serious elevation of the Blue Ridge Mountains to the west. The city itself has a genuine running culture, with established road running clubs and a calendar full of local races, so you won't feel like you're showing up to a one-off event. There's real infrastructure here for supporting runners, and the fall season in October means ideal conditions for the distance, with crisp mornings and moderate temperatures that most runners dream about. The Cannonball Marathon course takes full advantage of Greensboro's gentle terrain. With virtually no elevation gain across the full 42.2 kilometers, this is a course built for runners chasing time goals rather than scenic variety. The route stays between 218 and 285 meters above sea level, meaning the rolling character keeps things interesting without throwing any real climbs at you. This is the kind of course where your legs should feel relatively fresh at mile 20, assuming you've trained appropriately and managed your early pace. The road surface provides consistent footing throughout, which matters when you're looking to maintain momentum over the marathon distance. October in Greensboro typically offers exactly what a marathoner needs for optimal performance. The weather should be cool enough to keep you from overheating during the middle miles, but not so cold that you'll battle the elements. The local running community tends to show up well for this race, so you can expect decent crowd support along the course, which counts for something when you're suffering around mile 18. If you're targeting a personal record or simply want to run a marathon where the course won't fight against you, the Cannonball is worth considering.
Adjusted Time
3:52:33
Time difference: -7.5 minutes compared to a flat, road, temperate course.
On our difficulty model, Cannonball Marathon plays about 2 minutes faster than an average road marathon for a 3:30 runner. It ranks #1055 hardest of 1150 marathons we analyse, and #506 of 575 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Cannonball Marathon | Difference |
|---|---|---|
| 3:00:00 | 2:54:10 | −05:50 |
| 3:30:00 | 3:23:25 | −06:35 |
| 4:00:00 | 3:52:33 | −07:27 |
| 4:30:00 | 4:21:34 | −08:26 |
| 5:00:00 | 4:50:30 | −09:30 |
| 5:30:00 | 5:19:19 | −10:41 |
| 6:00:00 | 5:48:04 | −11:56 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Cannonball Marathon is a full marathon held in Greensboro, United States of America. It is scheduled for Saturday 17 October 2026. The course is run on road surface with 0m of total climbing, with its high point near 285m above sea level.
This is a very flat course, with only 0m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Cannonball Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Cannonball Marathon against other marathons to find the right race for your goals.
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