Eldora Resort in Boulder County. The ski area is just outside of Nederland. (Jesse Paul, The Colorado Sun)

Authorities say a skier died after he fell and slid into a tree at Eldora Mountain in northern Colorado.

Boulder County sheriff’s officials say the man, who was in his 50s, crashed on the expert Corona run on Thursday morning, and ski patrollers took him down the mountain to an ambulance at the base of the resort.

A medical helicopter was requested, but the pilot was unable to land because of gusty winds.

The man, whose name has not been released, was taken to a nearby hospital, where he was pronounced dead.

No other information was released. Eldora is about 20 miles southwest of Boulder.