Glendalough Lap of the Gap Marathon
Glendalough, Ireland · Sunday 20 June 2027
Glendalough Lap of the Gap Marathon is Ireland's toughest road marathon, held in the scenic Wicklow Mountains. The course starts in the monastic village of Glendalough and follows the traditional Lap of the Gap circuit, passing through dramatic heather landscapes and the Glenmacnass Waterfall. The route is known for its challenging hills and breathtaking views, making it a true test of endurance.
Difficulty Calculator
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:m
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Adjusted Time
4:31:51
Time difference: +31.8 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain798m
Elevation High497m
Elevation Low129m
Weather Forecast
High16°C
Low9°C
Chance of Rain0%
How hard is Glendalough Lap of the Gap Marathon?
Very Difficultharder than 82% of marathons
Flattest / easiestHardest
On our difficulty model, Glendalough Lap of the Gap Marathon plays about 28 minutes slower than an average road marathon for a 3:30 runner. It ranks #208 hardest of 1150 marathons we analyse, and #1 of 11 in Ireland. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Glendalough Lap of the Gap 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 Glendalough Lap of the Gap Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:14:54 | +14:54 |
| 3:30:00 | 3:52:55 | +22:55 |
| 4:00:00 | 4:31:51 | +31:51 |
| 4:30:00 | 5:11:38 | +41:38 |
| 5:00:00 | 5:52:12 | +52:12 |
| 5:30:00 | 6:33:31 | +1:03:31 |
| 6:00:00 | 7:15:33 | +1:15:33 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Glendalough Lap of the Gap Marathon 2027 Course Analysis
Glendalough Lap of the Gap Marathon is a full marathon held in Glendalough, Ireland. It is scheduled for Sunday 20 June 2027. The course is run on road surface with 798m of total climbing, with its high point near 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 climbing - well above the average road marathon - topping out around 497m above sea level. Hill training is essential, and you should expect a slower finish time than on 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 9°C to 16°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (0%), so dry conditions are likely.
Surface Type: Road
Glendalough Lap of the Gap 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 Glendalough Lap of the Gap Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Glendalough Lap of the Gap Marathon fits your goal, these courses play out about the same on our difficulty model.