As a result of this year’s extremely harsh winter, the ice on the Great Lakes is so thick the start of the Chi-Cheemaun ferry season could be delayed.

The Chi-Cheemaun ferry moves cars and passengers between Manitoulin Island and the Bruce Peninsula and is scheduled to start on May 2. But according to to Environment Canada, the ice will still be on the lake at that point.

The ice is so thick this year that even ice breakers have been unable to properly clear a path.

Ships will be able to sail as long as the ice has begun to break up, according to the Owen Sound Transportation Company, which runs the ferries.

This isn’t the first delay for the Chi-Cheemaun. Last year’s season was delayed due to low water levels causing problems with the ferry docks.