Eugene sits on the west bank of the Willamette (Wil-AM-et) River, facing its sister city Springfield on the east bank. The Cascade Range rises to the east, mountains of the Coast Range to the west. Bicycling, hiking, and jogging are especially popular here, with a variety of trails to choose from. Forests of Douglas fir support a lumber industry that accounts for 40 percent of the city's manufacturing. Eugene-Springfield is at the head of a series of dams built for flood control of the Willamette River Basin. Willamette National Forest headquarters is located here.