Have the map for your mountain biking ride on your iphone. This app covers the mountain biking parks in West Central Florida and has trail maps, addresses/directions and some information about the trails. The information includes links to websites of the organizations which maintain the trails for more details. The maps are in the app and do not require any service. They can be handy for new riders or riders trying out new trails. The trails are color coded by difficulty and while Florida has no mountains, it has some very steep and exciting terrain in former mining areas.
A common question is whether the GPS is tied into the maps (No). This is a possible future upgrade.