Bill Williams River

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The Bill Williams River is in western-central Arizona in Mohave County; the river proper is the northern border of La Paz County which it drains in the north, as well as areas of far western Yavapai County. It is a major drainage westwards into the Colorado River of the Lower Colorado River Valley south of Hoover Dam/Lake Mead, and the drainage basin covers portions of northwest, and west central Arizona. The equivalent drainage system paralleling the east-west lower reaches of the Bill Williams is the Gila River which flows east-to-west across central Arizona from western border New Mexico and joining the Colorado River in the southwest at Yuma; (it also collects from the drainage just east in northwest Arizona, to add to the total 60 percent of Arizona-half or more desert washes !). The Bill Williams River confluence with the Colorado, is north of Parker, and south of Lake Havasu City.

The two tributaries to the Bill Williams are the Big Sandy River and the Santa Maria River. Alamo Lake is a major fishing and recreation region on the Bill Williams River. The Colorado River confluence region and the Bill Williams River Delta and the entire riparian environment has state parks and wilderness areas, (Buckskin Mountain State Park, Cattail Cove State Park; also Gibralter Mountain, Swansea, and Cactus Plain Wildernesses).