Abstract: A portable electronic device configured to be used by a user riding a bicycle. The portable electronic device stores cartography data and climb data, and includes a location-determining element. The portable electronic device further includes a graphic display. Furthermore, the portable electronic device is configured to (i) determine, via the location-determining element, a location of the portable electronic device, (ii) determine, based on the location of the portable electronic device and the cartography data and/or the climb data, a predicted route along which the user is predicted to ride the bicycle, (iii) present, via the graphic display, information indicative of the predicted route, (iv) determine, based on the cartography data and/or the climb data, one or more optional routes located adjacent to the predicted route along which the user can optionally ride the bicycle, and (v) present, via the graphic display, climb data associated with the optional routes.