Case Details:Frank C. Farnsworth, a 48-year-old man from McKinnon, Wyoming, has been missing since May 16, 1986. Farnsworth was involved in a boating accident on Flaming Gorge Reservoir, which straddles the Utah–Wyoming state line, while on the water with his brother and two other men. He went into the reservoir and was not seen again.

Sweetwater County, Wyoming, is the presumed jurisdiction for the area of disappearance. Extensive searches of the reservoir were conducted at the time, but Farnsworth was never recovered. The case is documented in NamUs (Case #106331) and the Doe Network. No arrests, suspects, or persons of interest have been publicly reported in connection with the disappearance, consistent with its classification as an accidental drowning rather than a criminal matter. The case remains open and unresolved. Anyone with information is asked to contact the Sweetwater County Sheriff's Office or submit a tip through NamUs. Case Number 0114-86.