The official climbing season starts on July 1 and ends on August 31.
If you wish to climb in the off-season, you must submit a climbing plan to the local police or drop it in the post in front of the police box on the 5th station. Please download the FORM from here. No huts or shops are open during the off-season, and the road to the 5th station is closed after mid-November until late-April.