 Burgdorf had mined in nearby Warren to the east and turned the area at the hot springs into a resort by 1870.Following a new mining rush in 1898 at Thunder Gulch, the resort was refurbished and expanded in 1902 by Burgdorf and his new young wife, a singer from Denver named Janette Foronsard.Originally known as "Resort," it became "Burgdorf" at this time, but the former name continued in usage for several years.