Robert Allan Brown was a well-known and flamboyant prospector and speculator in the 19th and early 20th centuries, in the Canadian province of British Columbia. He was known generally as Volcanic Brown, especially in the province's Kootenay and Boundary districts, as well as adjoining Eastern Washington. He was known as Sunset Brown in the Similkameen District, and to others as Crazy Brown. His enthusiastic nature and flamboyant personality made him a fixture in mining industry news over a wide region, spanning the British Columbia-United States border.