I’ve tried mapping my ride at Brown County State Park with a few different programs. The data is from my Garmin eTrex Vista GPS, which is mounted on my handlebars. Here are the results (click for larger versions).

Google Earth:

Garmin Mapsource Topo:

ExpertGPS Trial - Topographic map:

ExpertGPS Trial - Aerial photo:

ExpertGPS Trial - Elevation Profile