Slippery rock dunes are really close to the slippery rock exit you get off on 80. I think its exit 105 but you turn left on the off ramp and its like a mile or two down the road. Like i said though, they charge you to ride there, its not much but still.. heres a website for it
http://paatving.net/Articles/slipper...rockdunes.aspx
PineCity is kind of a local riding place for me, not sure if its legal to ride there but its not a place that you would take a vehicle and drop off your quad. There is some advanced riding there, a lot of people get hurt on the hill climbs so they have shut down a few hills.
bry