The San Pedro Mezquital River () is a river of Nayarit, Mexico.

The river originates in the Sierra Madre Occidental, and flows through Durango and Nayarit states to empty into the Pacific Ocean in Marismas Nacionales Biosphere Reserve.González-Díaz, Alfonso Ángel, Miriam Soria-Barreto, Leonardo Martínez-Cardenas, and Manuel Blanco y Correa (2015) "Fishes in the lower San Pedro Mezquital River, Nayarit, Mexico". Check List 11(6): 1797, 26 November 2015 doi: http://dx.doi.org/10.15560/11.6.1797 ISSN 1809-127X

Fish A few fish species are native to the San Pedro Mezquital River. Among these are the two surviving Characodon splitfin species, which are both highly threatened. The extinct Durango shiner (Notropis aulidion) was native to the Rio Tunal, which forms the headwaters of the San Pedro Mezquital, a Pacific slope river rising near Durango City, Durango, Mexico (Chernoff and Miller 1986). It was taken there only in 1951 and 1961.

See also List of rivers of Mexico

References

The Prentice Hall American World Atlas, 1984. Rand McNally, The New International Atlas, 1993.