Maybe it's global warming, maybe it's highway maintenance budget cuts... or maybe it's just a fun map for rallying... You choose.
This map is a copy of the East Coast USA map with all the roads and terrain turned to dirt. I've done nothing else to it, so all the other stuff is the BeamNG's work.

Beta El Ferrito's East Coast Dirt Rally 1.0
USA - East Coast... but dirtier...