Algonquin Park Officials say cross country ski trails are becoming hazardous because of the weather.

Fen Lake, Old Railway and Minnesing trails are still open with just over 40 centimetres of snow. Officals say to use the trails cautiously.

Leaf Lake is just over 70 percent open after closing the rugged David Thompson loop.

They want to remind users of the trails to watch for potential hazards that may emerge from the snowpack.