At one time The Dalles was the end of the wagon haul on the Oregon Trail. Here the pioneers loaded their goods on boats and made the rest of their journey westward on the Columbia River. The falls and rapids that once made the river above The Dalles unnavigable are now submerged under water backed up by the Columbia River dams. The Dalles Dam is part of a system of dams extending barge traffic inland as far as Lewiston, Idaho, and Pasco, Washington. The port has berthing space for all types of shallow draft vessels. The chief source of income in the area is agriculture. The Dalles is noted for its cherry orchards and wheat fields located in the many canyons along the river.