Lucas la Colorado River…

The Colorado River is the master force behind the Grand Canyon having carved the 277-mile(446 km) chasm in northern Arizona over the last 5 to 6 million years.Length in Canyon: Flows 277 miles through Grand Canyon National Park,from Lees Ferry (Mile 0) to Pearce Ferry at Lake Mead.Depth-Scale:The river lies nearly a mile (up to 5,000–6,000 feet) below the canyon rims,with the riverbed itself reaching up to 110 feet deep in pools through the Granite Gorge.Water Temperature:Water released from Glen Canyon Dam near Lake Powell is cold—around 50°F (10°C) year-round—because it draws from deep beneath the surface of the reservoir.Geology:As the river cuts down through the Colorado Plateau,it exposes nearly 2 billion years of Earth's geological history in the layered rock walls.