The most recent edition on this page is dated May 23, 2026. The next edition date is not locked here yet. Use the historical race-morning weather on this page for planning until the next date is published.
Marathon
Clare Burren Marathon Challenge
Saturday, May 23, 2026Ballyvaughan, County Clare, Ireland
Goal time
3:15:00
Adjusted time (preview)
About 618 m of climbing and 617 m of descent. Hilly.
52% within 2%13% over 6%8 climbs
Impacts
Based on the historical mean for the race window over the last 10 years, ±5 days.
Elevation
Heat
Wind
Total Impact
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Race morning history
Last 10 years, around the 09:00 start hour. Typical late-May air averages 12°C (about 9°C to 15°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
11-14°C
Almost all
10-15°C
Humidity
74%
Dew
8°C
WBGT
11°C
Rain
0.1 mm/h
12°CAverage
09:00-12:18
Almost all (90%)Most mornings (70%)AverageRain
Year pills: green is favorable heat. Amber is moderate. Red is challenging.
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 3:18. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
SW
Most frequent (25%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
Year pills: green is favorable wind. Amber is moderate. Red is challenging. Colours assume no drafting.
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Lahinch Half Marathon
- Connemara International Marathon
- Cork City Marathon
- Dublin Marathon
- Great Limerick Run Marathon
- Medieval Marathon Kilkenny
- Run Galway Bay
- Waterford Viking Marathon
View race map for this area.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for Clare Burren Marathon Challenge.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
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