The Ogden River is older than the Wasatch Mountains. As the mountains slowly rose over the last 15 million years by periodic faulting on the Wastach fault, the river was able to cut through the landscape to create the remarkable Ogden Canyon, which is a roughly long canyon with a series of smaller side canyons. The city of Ogden is at the western end of Ogden Canyon with the eastern end at Pineview Dam.