DIFFICULTY RATING

Easiest (green line) Gravel or dirt surfaces that are relatively flat and wide.  Generally wide enough for an ATV to pass a full-sized vehicle.  May be dusty but are relatively smooth throughout with no rocks or roots protruding more than three inches above the surface. 

More Difficult (blue line) Loose gravel, sandy, rocky or slick rock surface. May have short sections that are narrow. Can have blind turns, steep or roller coaster grades, minor drop-offs, dust, ruts and frequent changes in riding surfaces.  Occasional obstacles may strike the frame.

Most Difficult (black line) Rocky surfaces, sharp turns, switchbacks, steep grades, narrow passages, low overhangs, ledges and large rocks.  Can be slippery and muddy when wet.  May have tree stumps, limbs or other debris.  Machines with low ground clearance may strike or high center on obstacles.  Some riders may be more comfortable using four-wheel drive machines.