TOPO! National Geographic USGS Topographic Maps (California)

National Geographic's TOPO! State Series CD-ROM equips backcountry explorers with the maps they need to reach mountain peaks, secluded lakes, and every road in between. Just pop this CD-ROM into your computer, and with easy-to-use tools, you can create your routes, generate elevation profiles, and view maps and trails in 3D. You can also transfer routes and waypoints between your computer and your GPS. The State Series uses the most detailed USGS topographic maps available, showing essential landmarks and navigational aids, so you'll know where to go on your backpacking, mountain biking, kayaking, and fishing adventures.