There is a little known feature of Google Maps that allows you to add features (trails, places of interest, roads, etc.) to the actual Google Map. If you would like to map the trails, locations, and other places in your area, you might check out:
http://www.google.com/mapmaker Any changes you make to the maps will need to be reviewed before they become public, but once you add things they will be seen by everyone who uses Google Maps!