We both got our early fly fishing chops from slinging flies into the bigger rivers in the inter-mountain West - the Madison, Gallatin, the Yellowstone, the Missouri, the Boulder, and others. In mid-life, we both moved to the Chicagoland area and had a rude awakening when fishing the spring creeks of the Driftless region. We caught fewer fish, and the rivers were not really rivers but small creeks. In this episode, we discuss the differences between the two regions to help fly fishers prepare for fishing either one.