Question: Windsor Beach, located in the northern portion of Lake Havasu, alongside the 1450 mi river, known as the "Colorado River", is administered by who?
Sentence (from "Colorado River"): Starting in the central Rocky Mountains in the U.S., the river flows generally southwest across the Colorado Plateau and through the Grand Canyon before reaching Lake Mead on the Arizona–Nevada border, where it turns south toward the international border.
Relevant evidence: No