This Aug. 20, 2011 photo shows boat tours on the Missouri River that take visitors through the Gates of the Mountains, an area noted in the journals of the Lewis and Clark expedition. The tours depart 17 miles north of Helena, Mont., and are offered by the Gates of the Mountain company. They are one of a number of activities available to visitors spending time in Helena for an annual Montana art festival called the Western Rendezvous of Art. (AP Photo/Ron Zellar)