AMA analyzing court decision that blocks Bush administration's "roadless" land management plan.(American Motorcyclist Association, George W. Bush)

A California federal court judge has tossed out the Bush administration's plan that governs activities in so-called roadless areas in national forests and grasslands nationwide, replacing it with an earlier plan put together by the former Clinton administration.

While the almost 60 million acres is called roadless, it contains thousands of miles of dirt roads and trails used by motorcyclists, ATV users, horse riders, hikers and others. At stake, potentially, is exactly how off-highway vehicles will be allowed to use trails in roadless areas. In some cases, those trails are currently open to off-highway uses. In others, the chance of new trails ever opening is in …