Gregory Leon Wholecheese, 31, was reported overdue from a boating trip on the Yukon River on May 31, 1987. He was traveling between Koyukuk and Galena and never arrived in Galena. At the time he disappeared he was wearing a Carhartt jacket with a blanket style lining, a checkered shirt, blue and black corduroy jeans, and slip-on boots.

The Alaska State Troopers searched for Gregory and his boat along that stretch of the Yukon, noted for strong currents, debris, and remote terrain, but no trace of him or the vessel was found. With no witnesses and no physical evidence recovered, the initial search efforts produced no leads and the case later grew cold; the file remains open with the Alaska State Troopers.

If anyone knew Gregory, saw him on the river that spring of 1987, or has information about his trip between Koyukuk and Galena, please come forward.