The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...

44 UNIVERSITY OF KANSAS PUBLS., MUS. NAT. HIST.
tain peaks exceeding 2100 meters in elevation, but only one (east
of San Ignacio) exceeds 2700 meters. The Gulf of California and
the Pacific Ocean limit the state to the west. The coast is extensively
divided into small islands and fringes of land that parallel
the mainland (Fig. 1).
FIG. 1. Physiographic map of SinaJoa, Mexico.
At least ten major rivers, all of which flow into the Gulf of California
or the Pacific Ocean, drain the state. The most important
rivers from north to south are: Rio Fuerte, Rio Sinaloa, Rio Mocorito,
Rio Culiacan, Rio San Lorenzo, Rio Elota, Rio Piaxtla, Rio