Originally Posted by nwmtnbkr

For accurate elevation data, I would suggest you download USGS topo maps. (Downloads are still free, you can pay a reasonable fee to get them on CD.) I live in the middle of a 2.2 million acre national forest and most of the unimproved forest roads I ride during good weather aren't on commercial maps. However, they are on the USGS topo maps. I have hacked my MIO C320 and run MioPocket, which turns my GPS unit into a CE-based PIM. This has allowed me to install other GPS apps including Ozi Explorer CE. I use Ozi Explorer to pull up the topo maps when I ride the forest here.