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This page contains archived content and is no longer being updated. At the time of publication, it represented the best available science. However, more recent observations and studies may have rendered some content obsolete.
Map of the Rio Grande Basin
The Rio Grande flows through arid parts of
Colorado and New Mexico, and along the southern two-thirds of its length forms the border between
Texas and Mexico. It is a primary source of fresh water for nearby communities. (Map copyright Cartesia Software)