Jacksonville Marathon
Monclair, United States of America · Monday 14 December 2026
The Jacksonville Marathon, held annually in December in Jacksonville, Florida, is a well-regarded event known for its fast and flat course. The race takes participants through scenic and tree-lined neighborhoods, offering a peaceful and enjoyable running experience. Starting and finishing at The Bolles School, the route features minimal elevation changes, making it perfect for both seasoned marathoners and first-timers.
Difficulty Calculator
h
:m
:s
Adjusted Time
3:58:58
Time difference: -1.0 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain67m
Elevation High9m
Elevation Low2m
Weather Forecast
High0°C
Low-6°C
Chance of Rain26%
How hard is Jacksonville Marathon?
Moderateharder than 46% of marathons
Flattest / easiestHardest
On our difficulty model, Jacksonville Marathon plays about 6 minutes slower than an average road marathon for a 3:30 runner. It ranks #624 hardest of 1151 marathons we analyse, and #333 of 576 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Jacksonville Marathon?
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 Jacksonville Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:02:01 | +02:01 |
| 3:30:00 | 3:30:33 | +00:33 |
| 4:00:00 | 3:58:58 | −01:02 |
| 4:30:00 | 4:27:15 | −02:45 |
| 5:00:00 | 4:55:24 | −04:36 |
| 5:30:00 | 5:23:27 | −06:33 |
| 6:00:00 | 5:51:24 | −08:36 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Jacksonville Marathon 2026 Course Analysis
Jacksonville Marathon is a full marathon held in Monclair, United States of America. It is scheduled for Monday 14 December 2026. The course is run on road surface with 67m of total climbing, with its high point near 9m above sea level. For registration and full race details, visit the official Jacksonville Marathon website.
Elevation Profile
This is a very flat course, with only 67m 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.
Expected Race Day Weather
Based on historical weather data for December, the expected race day conditions are as follows. Cold conditions are expected, with temperatures between -6°C and 0°C. While cold weather reduces overheating risk, runners should dress in layers and be prepared for potential wind chill. There is a moderate chance of rain (26%). Runners may want to prepare for wet conditions but shouldn't expect persistent rainfall.
Surface Type: Road
Jacksonville 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 Jacksonville Marathon against other marathons to find the right race for your goals.
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