The Rio Grande Trail is a proposed long-distance trail along the Rio Grande in New Mexico. The river extends over 1,800 total miles, some 700 miles of which pass through the heart of New Mexico. It is the state’s primary drainage feature and most valuable natural and cultural resource. The river and its bosque provide a wide variety of recreation, including hunting and fishing, birdwatching, river rafting, hiking, biking, and horseback riding. The river also flows through or beside numerous spectacular and geologically interesting landforms, the result of extensive volcanism and erosion of the valley within the Rio Grande Rift. Although some trail advocates would like to see the trail extended the full distance through New Mexico, from the Colorado border to the United States–Mexico border, the portion proposed for initial development extends 300 miles, from Bernalillo south to Las Cruces.