Delaware Half Marathon

Delaware Half Marathon 2025 Course Analysis

Delaware Half Marathon is a half marathon held in Wilmington, United States of America, scheduled for Sunday 6 April 2025. The course is run on road surface with 53m of total elevation gain, reaching a maximum altitude of 6m above sea level. For registration and full race details, visit the official Delaware Half Marathon website.

Elevation Profile

This is a very flat course with only 53m of total elevation gain across the full distance. The course ranges from -12m to 6m above sea level — a 18m 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 April, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 20°C and 28°C. Heat is one of the biggest performance factors in marathon running — research shows that for every degree above 15°C, marathon times slow by approximately 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (4%), so dry conditions are likely.

Surface Type: Road

Delaware Half 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 Delaware Half Marathon?

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