In general, snow remains on the Corsican mountains until the end of June. Quantity is variable from one year to another. On the GR20, two stages can be a problem if there is snow: Asco-Tighjettu and Manganu-Petra Piana. In case of heavy snow, you will need spikes on these stages to pass. Important: spikes are the only equipment allowing you to walk safely on hard snow. Do not hesitate to contact us if you are not sure of snow conditions.