by the tension between these various uses—grazing, logging, and dispersed recreation—studies, such as the NMSU paper quoted above, have shown that no one industry can produce enough economic benefit for the region to offset the loss of revenues implied by the removal of one or both of the other two. Firewood collection While organized commercial logging has been drastically reduced in the forest area since 1990, the public use of the timber and forest resources by the public has continued, mainly in the collection of firewood. Forest visitors can purchase permits entitling them to collect up to four cords of timber, both "dead and down" and "green standing" from designated firewood collection areas throughout the forest. These permits are available at the Forest Headquarters and the three Ranger District offices. Christmas trees Along with collecting firewood, another long-standing tradition in the Lincoln National Forest is the cutting of Christmas trees during the holiday season. Permits to harvest Christmas trees can be purchased at the Forest Headquarters or any of the three District Ranger Offices. Recreation Ranging from the floor of the Chihuahuan Desert to the forested peaks of the Sacramento and White Mountains, the Lincoln National Forest is a popular destination for year-around recreation, offering developed and dispersed camping, group picnic and camping facilities, developed trails for hikers, equestrians, and OHV's, wilderness areas, ski areas, and designated snow play areas. Smokey Bear Ranger District The Smokey Bear district has 6 developed family campgrounds and 2 group-camping areas. Three of these areas, Montjeau, Baca, and Skyline are free, the others are fee areas. Two areas located at lower elevation, Three Rivers and Baca, are open year-around. The others, located at higher elevations, generally operate on a May to September schedule, subject to weather. Picnic areas include Schoolhouse Canyon on the Rio Bonito, and Cedar Creek Picnic Area, which has picnic tables, grills, water, and restrooms. Cedar Creek also offers a covered group picnic pavilion that can be reserved by groups of less than 40. The district has over 50 hiking trails of varying lengths and all difficulty levels. The majority of these trails are less than three miles in length and are located within the two designated wilderness areas. Longer backpacking trails include the 20-mile long Crest Trail (T25) in the White Mountain Wilderness and the 11.1 mile long South Base Trail (T57 ) in the Capitan Wilderness. Sacramento Ranger District