It is true that the Wilderness Act forbids "mechanical transport." By this, however, Congress meant people being moved around by machines, not people moving themselves with mechanical assistance. Now that wilderness acreage is larger than California and Maryland combined—vastly larger than when the walk-only rules were imposed—there is a pressing need to restore Congress' original vision. ...The Sustainable Trails Coalition's proposal is modest. It would not permit mountain biking or walking with a baby stroller everywhere. Instead, local land managers would be given the discretion to allow forms of human-powered travel where they believe it's appropriate. The United States has 765 wilderness areas, each one managed by officials who know the terrain.