Trail Grigne Sud
Mandello del Lario, Italy · Expected Saturday 25 September 2027Date to be confirmed
Difficulty Calculator
Adjusted Time
7:38:05
Time difference: +218.1 minutes compared to an average road marathon.
Course Details
Typical Race-Day Weather
Average for this date over the last 8 years.
How hard is Trail Grigne Sud?
On our difficulty model, Trail Grigne Sud plays about 170 minutes slower than an average road marathon for a 3:30 runner. It ranks #1 hardest of 860 marathons we analyse, and #1 of 56 in Italy. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Trail Grigne Sud?
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 Trail Grigne Sud | Difference |
|---|---|---|
| 3:00:00 | 5:06:52 | +2:06:52 |
| 3:30:00 | 6:20:19 | +2:50:19 |
| 4:00:00 | 7:38:05 | +3:38:05 |
| 4:30:00 | 8:59:56 | +4:29:56 |
| 5:00:00 | 10:25:35 | +5:25:35 |
| 5:30:00 | 11:54:52 | +6:24:52 |
| 6:00:00 | 13:27:37 | +7:27:37 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Trail Grigne Sud 2027 Course Analysis
Trail Grigne Sud is a full marathon held in Mandello del Lario, Italy. The next edition is expected on Saturday 25 September 2027, following the pattern of previous editions (the last Saturday of September). The organisers have not confirmed it yet. The course is run on trail surface with 3547m of total climbing, with its high point near 1814m above sea level. For registration and full race details, visit the official Trail Grigne Sud website.
Climbing
At 3547m of total climbing, it is hillier than 100% of the 860 marathons we rate. The hills will cost time: pace the climbs on effort, not on the watch. It runs at altitude (up to about 1814m), where thinner air slows most runners who live near sea level.
Race-day weather
Over the last 5 years this September date has averaged a high of 21°C and a low of 15°C. That is warmer than 65% of the marathons we track. On our model the expected temperature costs a 3:30 marathoner about 5 minutes against the same course on a cool 12°C day.
On 25 September over the last 5 years, the high ranged from 18°C (2025) to 23°C (2023). It rained on 3 of those 5 days.
| 25 September | High | Low | Rain | Wind |
|---|---|---|---|---|
| 2026 | 21°C | 16°C | dry | 5 km/h |
| 2025 | 18°C | 12°C | 4 h | 8 km/h |
| 2023 | 23°C | 13°C | dry | 8 km/h |
| 2021 | 23°C | 16°C | 5 h | 8 km/h |
| 2019 | 22°C | 18°C | 2 h | 5 km/h |
Daily weather for the race location (Open-Meteo archive). Wind is the day's peak.
Surface
Trail: expect unpaved footing (dirt, gravel or forest paths), which our model counts as slower than road for the same climbing. Trail shoes with grip are worth it.
Looking for an easier marathon or a tougher challenge? You can also compare Trail Grigne Sud against other marathons to find the right race for your goals.
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