This is the Colorado River as it flows past Dead Horse Point State Park, Utah.

According to http://www.stateparks.utah.gov/park_pages/scenicparkpage.php?id=dhsp
"Utah’s Grand Canyon - Dead Horse Point State Park is perhaps Utah's most spectacular state park. Towering 2,000 feet directly above the Colorado River, the mesa that is Dead Horse Point provides breathtaking views of the canyon country of southeastern Utah and the pinnacles and buttes of Canyonlands National Park. "