The GR 20 is a 184 km trail that starts in Conca, France and ends in Calenzana, France. The trail is considered to be extra difficult to hike and has a total elevation gain of 11831m. Normally the trail takes 1 days to complete but can be finished in as little as 1 day.
The warmest months are June, July, and August and the coldest months are December, January, and February. The wettest months are March, April, and May and the driest months are June, July, and August.