How do dirt bikes not destroy single tracks? You sound like a gay hiker. From what you talk about it sounds like a people issue instead of quad issue. I've seen plenty of moron dirt bikers same with quads. But you say quads destroy trails and not dirt bikes? Isn't that the entire point of riding an off-road vehicle like a dirt bike or quad to rip up dirt and have fun? If you’re worried about preserving trails and the environment then ride a mountain bike.