This weekend, visitors driving onto the Mount Baker-Snoqualmie National Forest will need a map showing what type of motor vehicles they can use and where they can use them.

The maps are free at Forest Service offices and on the Mount Baker-Snoqualmie National Forest Web site.

The map changes how the Forest Service will enforce road closures to motor vehicles on national forests. Those travelling on a forest road, area or trail not shown on the map can be fined.

The map is a result of the 2005 National Travel Management Rule requiring each national forest to assess road systems to limit environmental damage caused by off-highway vehicles, such as jeeps, motorcycles and quads, and to create a uniform system of enforcement across the country. The rule does not apply to snowmobiles.