I found a link to some marked motorcycle trails here in Albuquerque, NM.
If you go to the link I provided, it's on the second page down.
http://www.fs.usda.gov/Internet/FSE_...rdb5336239.pdf
Look at the area NW to the "Closed to Public Entry".
All those dotted trails are for motorcycles only ...not even ATV's are allowed, strictly bikes only.
They even have the fence set where you can only get a bike through, ATV's won't fit.
Don't go over into the "Closed Area".
Feds will be on you like white on rice. It is almost as secure as Area 51, as the area, I've been told, houses nuclear materials and or nuclear waste.
I've heard, just step over the boundary and they're on ya!!