Colorado back roads & 4-wheel-drive trails. You can get this at the forest service. Great maps it's not free. 35.00$
If you can go to an REI store before your trip they have wonderful maps, too.
Either a standard topographic GPS Device Google Maps or mayb3 the welcome center I w9uld bet welcome center has all old and new trails and silverton co has dirt mountain passes that ive herd are worth the trip one to orphis and few others that dead end to glaciers
If you go into Ourey any of the stores. Best information is ask anyone working anywhere is the real way to go. Ask locals for the real best places
WETA is a good start although they are more geared towards hiking/biking. And the Stay the trail organisation is a good resource as well.
Hmm well ik they sell them around the big maps before trails usually and there are maps by the gondolas in telluride
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