The Spokane River flows approximately 111 miles from Lake Coeur D'Alene in Idaho through Spokane, WA and into the Columbia River. The Spokane River contains a high concentration of heavy metals resulting from pollution from Lake Coeur D'Alene and the smelting and mining in the area. Steelhead and salmon were abundant in the river prior to the industrial growth in the early 1900s. Several dams were constructed on the river to support the local industries and as a result the salmon and steelhead populations disappeared. The river supports a good population of rainbow trout and a smaller brown trout population. However, the fish may not be suitable for consumption due to the river's pollution. The best time to fish the river is July - September.