Seacoast Half Marathon

Seacoast Half Marathon 2026 Course Analysis

Seacoast Half Marathon is a half marathon held in Portsmouth, NH 03801, US, United States of America, scheduled for Sunday 25 October 2026. The course is run on road surface with 116m of total elevation gain, reaching a maximum altitude of 20m above sea level. For registration and full race details, visit the official Seacoast Half Marathon website.

Elevation Profile

With 116m of elevation gain, this is a moderately undulating course. The route ranges from 2m to 20m above sea level (18m total range). While not completely flat, the elevation changes are manageable for most runners and shouldn't significantly impact pacing strategy.

Expected Race Day Weather

Based on historical weather data for October, the expected race day conditions are as follows. Cold conditions are expected, with temperatures between 3°C and 12°C. While cold weather reduces overheating risk, runners should dress in layers and be prepared for potential wind chill. There is a low chance of rain (4%), so dry conditions are likely.

Surface Type: Road

Seacoast 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 Seacoast Half Marathon?

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