Logging firms' rapid devastation of the forests of the Appalachians sparked a movement among conservationists to preserve what remained and allow the land to "heal". In 1911, Congress passed the Weeks Act, giving the federal government authority to create national forests east of the Mississippi River and control timber harvesting. Regional writers and business interests led a movement to create national parks in the eastern United States similar to Yosemite and Yellowstone in the west, culminating in the creation of the Great Smoky Mountains National Park in Tennessee and North Carolina, Shenandoah National Park in Virginia, Cumberland Gap National Historical Park in Kentucky, Virginia and Tennessee, and the Blue Ridge Parkway (connecting the two) in the 1930s. During the same period, New England forester Benton MacKaye led the movement to build the Appalachian Trail, stretching from Georgia to Maine.