Antrim Coast Half Marathon
Larne, United Kingdom · Sunday 23 August 2026
A bucket-list race for runners who love coastal scenery, the Antrim Coast Half Marathon showcases some of Northern Ireland’s most breathtaking landscapes. The course follows the rugged coastline of County Antrim, treating participants to dramatic cliffs, sweeping ocean views, and the occasional glimpse of Scotland across the water.
Difficulty Calculator
h
:m
:s
Adjusted Time
1:43:17
Time difference: -1.7 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain66m
Elevation High35m
Elevation Low7m
Weather Forecast
High17°C
Low12°C
Chance of Rain0%
How hard is Antrim Coast Half Marathon?
Moderateharder than 20% of half marathons
Flattest / easiestHardest
On our difficulty model, Antrim Coast Half Marathon plays about even with an average road half marathon for a 1:30 runner. It ranks #359 hardest of 450 half marathons we analyse, and #74 of 89 in United Kingdom. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Antrim Coast Half Marathon?
Estimated finish times on this course versus the same effort on an average road half marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Antrim Coast Half Marathon | Difference |
|---|---|---|
| 1:30:00 | 1:28:14 | −01:46 |
| 1:45:00 | 1:43:17 | −01:43 |
| 2:00:00 | 1:58:20 | −01:40 |
| 2:15:00 | 2:13:24 | −01:36 |
| 2:30:00 | 2:28:27 | −01:33 |
| 2:45:00 | 2:43:30 | −01:30 |
| 3:00:00 | 2:58:33 | −01:27 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Antrim Coast Half Marathon 2026 Course Analysis
Antrim Coast Half Marathon is a half marathon held in Larne, United Kingdom. It is scheduled for Sunday 23 August 2026. The course is run on road surface with 66m of total climbing, with its high point near 35m above sea level. For registration and full race details, visit the official Antrim Coast Half Marathon website.
Elevation Profile
This is a very flat course, with only 66m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Expected Race Day Weather
Based on historical weather data for August, 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 low chance of rain (0%), so dry conditions are likely.
Surface Type: Road
Antrim Coast Half 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 Antrim Coast Half Marathon against other half marathons to find the right race for your goals.
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If Antrim Coast Half Marathon fits your goal, these courses play out about the same on our difficulty model.
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