From Baton Rouge:

Take I-110 North until the Interstate ends at Highway 61 (Exit 8B).
Veer to the right and begin north on Highway 61 toward St. Francisville.
Go 3.2 miles, then veer right and begin north on Highway 964 (Old Scenic Highway).
Continue on Highway 964 for approximately 4.4 miles and the entrance to Copper Mill will be on your right.