Jacksonville Marathon

Jacksonville Marathon 2025 Course Analysis

Jacksonville Marathon is a full marathon held in Monclair, United States of America, scheduled for Sunday 14 December 2025. The course is run on road surface with 67m of total elevation gain, reaching a maximum altitude of 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 elevation gain across the full distance. The course ranges from 2m to 9m above sea level — a 7m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.

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 marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.

How Difficult Is Jacksonville Marathon?

Our difficulty rating for Jacksonville 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 Jacksonville Marathon against other marathons to find the right race for your goals.