List of trails in Grand Canyon National Park
The following is a list of hiking trails that are, in whole or part, within the established boundaries of Grand Canyon National Park, located in Coconino and Mohave counties in the U.S. state of Arizona. Management. All pack and foot trails in Grand Canyon National Park fall under the jurisdiction of the Grand Canyon Backcountry Office (BCO), located in the Backcountry Information Center in Grand Canyon Village. This building previously housed a railway depot. The BCO administers trail maintenance, patrol, and search and rescue operations in the Grand Canyon's backcountry areas . The Grand Canyon Backcountry Office manages undeveloped areas of the canyon by following the 1988 Backcountry Management Plan (BMP), as amended. The goal of the plan is to mitigate human impacts to ecologically sensitive areas within the park. In those areas, the BMP provides management guidelines for: The adoption of the BMP marked the first time permits were required for overnight use of the park's backcountry. The permit process was instituted on 1 October 1988 and is still in use today. Permits may be applied for up to four months in advance of a hiker's planned itinerary, on  the first day of each month. Permit requests may be faxed, mailed, or delivered in-person. A permit is "not" required for day use of backcountry trails. Fees are required to obtain backcountry-use permits. Information can be obtained from the parks Backcountry Information Center. The Park Service asks that travelers abide by Leave No Trace principles. Backcountry trail designations. Established trails within backcountry areas of the park are assigned one of the following designations by the National Park Service: These designations define the expected daily use of a trail, as well as its level of management, maintenance, and patrol  by park personnel or backcountry rangers. Corridor trails. A corridor trail receives the highest hiking and stock use by visitors to the park and mule use by park concessionaires. To accommodate this, the National Park Service regularly patrols and maintains corridor trails. Backcountry rangers recommend that hikers taking their first trip into the inner canyon use one of the park's Corridor trails. These areas include three campgrounds: Indian Garden, Bright Angel, and Cottonwood, each of which have ranger stations, water, and emergency phones. The following are designated as corridor trails: The South Kaibab Trail and North Kaibab Trail are  officially part of the Arizona Trail system which crosses the park from south to north, although they retain their original names in all park publications and signage. Threshold trails. A threshold trail receives lower visitation than corridor trails, but will receive more than primitive trails. The National Park Service does not regularly maintain threshold trails, but reconstructs sections damaged by environmental forces, or to prevent further trail erosion. Maintenance will also be done to protect historical features along a threshold trail. Cairns are permitted, but are to be placed discriminately. The following are designated as threshold trails: Primitive trails. A  primitive trail receives the least visitation of all trails. The National Park Service does not regularly maintain primitive trails, but reconstructs sections damaged by environmental forces only in cases where its existing condition creates a hazard. Multiple trail eradication is done to prevent accidental off-trail hiking. Cairns are permitted, but are to be placed discriminately. The following are designated as primitive trails: Routes. A route is a footpath that does not fall under the definition of trail because it was not deliberately constructed, or contains portions of trails that have fallen into such disrepair that they can no longer  be identified on a map. Routes may exist due to cross-country hiking or animal use. Due to their difficulty, routes receive the lowest visitation of all footpaths within the park. The National Park Service only maintains routes to minimize damage to nearby natural resources. The following do not fall into any of the above trail designations, and are classified as routes: Above-rim trails. The following hiking trails exist within Grand Canyon National Park but do not venture below the rim of the canyon.