Parker is located in La Paz County, Arizona, on the Colorado River in Parker Valley. Alamo Lake, managed by Arizona State Parks, is one of the best bass lakes in Arizona. The project adjoins BLM land and enjoys good wildlife viewing opportunities. There is also Lake Havasu, which is 45 miles long and is a Colorado River reservoir that was created when the Parker Dam was completed in 1938. It is a desert lake surrounded by cliff walls and is a popular boating destination.