Pinecliffe is a U.S. Post Office and an unincorporated community located in Boulder County and Gilpin County, Colorado, United States. The Pinecliffe Post Office, in Boulder County, has the ZIP Code 80471. Geography Pinecliffe is located at (39.931591,-105.428753). Gallery References Unincorporated communities in Boulder County, Colorado Unincorporated communities in Gilpin County, Colorado Unincorporated communities in Colorado