An assisted zone guidance system automatically activates a stored assisted guidance region based upon collar position at initiation, relative location of one or more assisted guidance regions, and possible query results. The assisted guidance regions are stored within a look-up table that is defined by at least one reference point, and rows and columns that are offset from the reference. The table rows and columns correspond to geographic locations. The value retrieved from the indexed array is used to either create a new assisted guidance region, select an assisted guidance region that contains the current collar location, or if the collar is not within a region to select an adjacent assisted guidance region. Each assisted guidance region contains a plurality of guidance zones that each have an associated set of characteristics used to provide behavioral guidance to an animal.