Bitterroot's Copper Range Lands cover 106 square miles of the famous Keweenaw copper district, which was the United States' primary domestic source of copper until the mid-1960s. The Keweenaw district produced more than eight million tonnes of copper between 1845 and 1995. There are more than 100 past-producing copper mines, pits, and prospects located within or adjacent to this land package, which has been subjected to limited exploration drilling since the early 1900s.
In the period from 2009 to 2013, Bitterroot's ground-based and airborne geophysical surveys and geological mapping defined several drill targets prospective for copper and nickel mineralization. Bitterroot's exploration focus has been the Norwich layered intrusion which occurs on the southern end of the Copper Range Lands, just south of the White Pine copper mine. Two holes were drilled at Norwich in October 2013. These drill holes did not intersect mineralization in the intrusion. Additional targets are being assessed within the area.