
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.
Cannonball Marathon is a full marathon held in Greensboro, United States of America, scheduled for Saturday 17 October 2026. The course is run on road surface with 0m of total elevation gain, reaching a maximum altitude of 285m above sea level.
This is a very flat course with only 0m of total elevation gain across the full distance. The course ranges from 218m to 285m above sea level — a 67m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Cannonball Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Cannonball Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
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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