To complete the Endura lines, beside Outback and Safari, Lowrance also introduced Sierra which have all of the features that include on the both previous model. For some additional, the Lowrance Endura Sierra complete with pre-loaded content with Intermap’s Accurate topographic maps, outdoor trail networks and POIs. It boast NAVTEQ road network to coverage 48 states with optional upgrade for full-features turn-by-turn navigation. It has 4GB internal memory which can be expand via microSD slot up to 32GB of capacity. Lowrance Endura Sierra also comes in May and cost at $550.