This state's first major gold strike occurred about 65 miles SW of Butte on Grasshopper Creek on July 28, 1862
...... 02/21 - 02/28 (1)... [DOC] [TLE] Beaverhead County, Montana - USGS Publications Warehouse [PAR] Characteristics 28 ... a window through a major thrust and adjacent to the Pioneer 
batholith; (4) ... area is located about 50 km