Here's what other sites are saying:
The Garmin MapSource Topo U.S. 24K microSD data card lets you add richly detailed topographic maps of Idaho, Montana and Wyoming to your Garmin GPS receiver.
Garmin's new TOPO U.S. 24K gives you the highest level of topographic detail available. They have taken 24K topo data for the U.S. and have made regionalized coverage available on DVD or preprogrammed microSD cards with SD adapter. These new TOPO U.S. 24K regions will help ensure you're ready for your next backpacking, hiking or camping adventure.
- Altrec Outdoors
Garmin Topo US Southwest 24K DVD
Garmin TOPO US 24K North Central microSD
Garmin Topo US North Central 24K DVD US Mountain States Map Application / US Midwest Map Application
National Geographic TOPO! Montana CD-ROM
National Geographic Weekend Explorer 3D - Tucson Area CD-ROM
National Geographic TOPO! Colorado CD-ROM
Satmap National Geographic TOPO! Nevada SD Card
National Geographic Utah Rocky Mountain Maps