Dolores River
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The Dolores River is a tributary of the Colorado River, approximately 250 mi (402 km) long, in the U.S. states of Colorado and Utah.
It rises in southwestern Colorado near Dolores Peak and Mt. Wilson in the San Miguel Mountains. It flows southwest, past the town of Dolores, where it turns, flowing north and northwest. It flows through the Dolores River Canyon before receiving the San Miguel River in Montrose County and crossing into Utah, where it joins the Colorado in Grand County near the Fisher Towers.
The river was explored and possibly named by Juan Maria Antonio Rivera during an 1765 expedition from Santa Fe.
The Dolores is navigable by small boats from the San Miguel River to its mouth with the Colorado. However the river is extensively used for irrigation and during low water years is wholly unnavigable.