sentences:  Mountain man Pauline Weaver discovered placer gold on the east side of the Colorado River in 1862.Weaver's discovery started the Colorado River Gold Rush to the now ghost town of La Paz, Arizona and other locations along the river in the ensuing years.The most prominent of these were those of the San Francisco district, which includes the towns of Oatman, Bullhead City and Katherine in Mohave County was discovered in 1863 or 1864, but saw little activity until a rush to the district occurred in 1902.