You can rely too heavily on technology, especially in the back country. Just because you have a cell phone or a Global Positioning System receiver doesn't mean you won't get lost. In February, the U.S. Geological Survey office in Lakewood offered free two-hour courses on maps and compass reading and how to relate both skills to the proper use of GPS. While a bare-bones GPS costs about $150, you should also pop for a topo map; using the two together you'll always know exactly where you are. How to get back from there is up to you.