Click on the TOPO U.S. 24K DVD for your area for complete information:
The highest level of topographic detail available for your device, comparable to 1:24,000 scale USGS maps for all of California, Nevada, Oregon and Washington. On DVD with BaseCamp Software. (See compatible units at Garmin's website - click on Products Tab) 3,923 MB
The highest level of topographic detail available for your device, comparable to 1:24,000 scale USGS maps for all of Arizona, Colorado, New Mexico and Utah. On DVD with BaseCamp Software. (See compatible units at Garmin's website - click on Products Tab) 2,942 MB