March 16 th , 2006 Wade Watson In northern Minnesota glacial lakes,  smallmouth bass  follow a distinct seasonal migration driven by water temperature, spawning instincts, and the movement of prey. Their patterns generally cycle between shallow spawning grounds and deep wintering holes, often utilizing specific underwater structures as "highways" between these areas.  Smallmouth Bass General Patterns:     Seasonal Migration Cycle Spring (Ice-out to June): Movement:  As water