Gloria Marshall

Mystery Lake is an American adventure film from 1953, directed by Larry Lansburgh.

Jed Clampett's swamp is loaded with oil. When a wildcatter discovers the huge pool, Jed sells his land to the O.K. Oil Company and at the urging of cousin Pearl, moves his family to a 35-room mansion in Beverly Hills, California.

The Bradley family are proud owners of the Shady Rest Hotel. Kate and her three young daughters do the job of running the hotel.