Michael Combs, 42, was found late Tuesday morning in trees near the bottom of Vail Mountain, Eagle County sheriff's spokeswoman Kim Andree said. He was reported missing Monday night.
Combs, of Calabasas, Calif., had been snowboarding with Alison Eastwood, the actor/director's daughter, Andree said. Ski patrol members and crews that groom the slopes at night had been looking for him.
Eastwood's daughter told a sheriff's deputy that Combs had complained earlier Monday that he wasn't feeling well and had a headache.
The cause of death had not been determined. An autopsy report was expected Thursday.
Clint Eastwood was not at the resort, Andree said. His Los Angeles office released a statement saying the family was shocked and saddened by the accident.