Predict your Dublin Marathon finish time from a recent race, with the course climb and typical late-October weather already built in. Then use the course notes below to plan your pacing and fuelling.
Use a recent all-out race on a fairly flat course in mild weather.
Filled in with the typical weather for the race month. Change it to the forecast closer to race day.
Before we send your report: your gels
Check the label on the gel you train with. We use this to build your gel-by-gel race timeline. Already training your gut to take more carbs? Set your own hourly target.
Get your full race report by email: your pacing plan split by split, carbohydrate, fluid and sodium per hour for this finish time, a gel-by-gel race timeline, and course notes.
Figures from the 2025 course track. Routes can change from year to year, so check the official race website before race day.
42.2 km, starting and finishing in Dublin city centre.
About 175 m of climbing and 177 m of descent in total. Not a flat course, but no long, steep hills.
Highest point roughly 65–70 m around km 12. Lowest about 10 m, around km 16 and again near km 40.
Around 12°C and 75% humidity in late October. Cool conditions suit fast running, so check the forecast for wind in race week.
Based on the 2025 course track, kilometre by kilometre:
Pacing. Dublin rewards patience. The first 12 km climb gently, so goal pace there costs more effort than it feels. Run the climbs by effort and accept a few seconds per kilometre, use the drop after km 12 to settle rather than bank time, and save something for the climb around km 34. The predictor already builds this in: it adds time for the climbs, gives some back on the descents and adjusts for temperature and humidity.
Fuelling. Most marathon runners aim for 60–75 g of carbohydrate per hour, and more if they have practised it in training. The predictor’s emailed report and the fuelling calculator give you a gel timeline by kilometre, including where caffeine fits if you use it.
In person at the Endurance Lab studio in Dún Laoghaire.
A 60-minute sports massage a few days before the race to loosen tight legs without leaving them heavy. €60. Book a sports massage →
Book it now for the week after the race, once the worst of the soreness has eased. €60. Book a sports massage →
Turn the prediction into a race. Pick the support that fits your build-up.
A plan built around you and race day in Dublin, adjusted week by week by your coach. See Dublin Marathon coaching →
A VO2max or lactate test in the lab gives you heart-rate and pace zones based on your own physiology, not a formula. VO2max test → Lactate test →
5K, 10K and half marathon plans on the Endurance Lab 7-zone method. One plan, one purchase. See the plans →
Carbohydrate, fluid and sodium targets for race day, with a gel timeline. Plan your fuelling →
More race guides. Ireland: Dublin Half Marathon · Cork City Marathon · Belfast City Marathon. Portugal: Lisbon Marathon · Funchal Marathon.
More free tools: Race time predictor · Zone calculator · All free tools
