Glendalough Lap of the Gap Marathon

Glendalough Lap of the Gap Marathon 2026 Course Analysis

Glendalough Lap of the Gap Marathon is a full marathon held in Glendalough, Ireland, scheduled for Saturday 20 June 2026. The course is run on road surface with 798m of total elevation gain, reaching a maximum altitude of 497m above sea level. For registration and full race details, visit the official Glendalough Lap of the Gap Marathon website.

Elevation Profile

This is a very challenging course with 798m of total elevation gain — significantly more than the average road marathon. The route ranges from 129m to 497m above sea level (368m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.

Expected Race Day Weather

Based on historical weather data for June, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 12°C to 17°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (100%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.

Surface Type: Road

Glendalough Lap of the Gap 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 Glendalough Lap of the Gap Marathon?

Our difficulty rating for Glendalough Lap of the Gap 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 Glendalough Lap of the Gap Marathon against other marathons to find the right race for your goals.