Gold strikes in Idaho Territory in the early 1860s attracted many migrants who initiated major gold rushes at Grasshopper Creek (Bannack) and Alder Gulch (Virginia City) in 1862 and 1863 respectively. So many people came that the federal government created a new territory called Montana in May 1864. The miners prospected far and wide for new placer gold discoveries. On July 14, 1864, the discovery of gold by a prospecting party known as the "Four Georgians" in a gulch off the Prickly Pear Creek led to the founding of a mining camp along a small creek in the area they called "Last Chance Gulch".