|Gifford Pinchot National Forest
|north of Morton
|3,035 ft (925 m)
|427 ft (130 m)
|29 mi (47 km)
|154 sq mi (400 km2)
The Tilton River is a tributary of the Cowlitz River, in the U.S. state of Washington. Named for territorial surveyor James Tilton, 29 miles (47 km), entirely within Lewis County.it flows for about
The Tilton River originates in the Cascade Range just north of Mount St. Helens and southwest of Mount Rainier. It flows south and west, joining the Cowlitz River in Lake Mayfield, near Mossyrock.
The Chehalis River is a river in Washington in the United States. It originates in several forks in southwestern Washington, flows east, then north, then west, in a large curve, before emptying into Grays Harbor, an estuary of the Pacific Ocean.
The Cowlitz River is a river in the state of Washington in the United States, a tributary of the Columbia River. Its tributaries drain a large region including the slopes of Mount Rainier, Mount Adams, and Mount St. Helens.
The Lewis River is a tributary of the Columbia River, about 95 miles (153 km) long, in southwestern Washington in the United States. It drains part of the Cascade Range north of the Columbia River. The drainage basin of the Lewis River covers about 1,046 square miles (2,709 km2). The river's mean annual discharge is about 6,125 cubic feet per second (173.4 m3/s). Unlike nearby Lewis County and Fort Lewis the Lewis River was not named for Meriwether Lewis, but rather for A. Lee Lewis, an early colonizer who homesteaded near the mouth of the river.
The North Fork Toutle River is a tributary of the Toutle River in southwestern Washington in the United States. The river has its headwaters near Spirit Lake, on the north side of Mount St. Helens, and flows 39 miles (63 km) to the Toutle River, about 17 miles (27 km) upstream of its confluence with the Cowlitz River. The largest tributary is the Green River, which joins near the unincorporated town of Toutle.
The Skokomish River is a river in Mason County, Washington, United States. It is the largest river flowing into Hood Canal, a western arm of Puget Sound. From its source at the confluence of the North and South Forks the main stem Skokomish River is approximately 9 miles (14 km) long. The longer South Fork Skokomish River is 40 miles (64 km), making the length of the whole river via its longest tributary about 49 miles (79 km). The North Fork Skokomish River is approximately 34 miles (55 km) long. A significant part of the Skokomish River's watershed is within Olympic National Forest and Olympic National Park.
The Toutle River is a 17.2-mile (27.7 km) tributary of the Cowlitz River in the U.S. state of Washington. It rises in two forks merging near Toutle below Mount St. Helens and joins the Cowlitz near Castle Rock, 20 miles (32 km) upstream of the larger river's confluence with the Columbia River.
The Cispus River is about 54 miles (87 km) long and flows into the Cowlitz River at Lake Scanewa in the Cascade Range of Washington. Its tributaries drain most of south-central and southeastern Lewis County, extreme northeast Skamania County, and some of western Yakima County.
The White Salmon River is a 44-mile (71 km) tributary of the Columbia River in the U.S. state of Washington. Originating on the slopes of Mount Adams, it flows into the Columbia Gorge near the community of Underwood. Parts of the river have been designated Wild and Scenic. The principal tributaries of the White Salmon River include Trout Lake and Buck, Mill, Dry, Gilmer, and Rattlesnake Creeks.
The Touchet River is a 55-mile (89 km) tributary of the Walla Walla River in southeastern Washington in the United States. The Touchet River drains an area of about 740 square miles (1,900 km2) in Columbia County and Walla Walla County.
The Colville River is a 60-mile (100 km) long tributary of the Columbia River in northeastern Washington in the United States.
The Naches River is a tributary of the Yakima River in central Washington in the United States. Beginning as the Little Naches River, it is about 75 miles (121 km) long. After the confluence of the Little Naches and Bumping River the name becomes simply the Naches River. The Naches and its tributaries drain a portion of the eastern side of the Cascade Range, east of Mount Rainier and northeast of Mount Adams. In terms of discharge, the Naches River is the largest tributary of the Yakima River.
The Wind River is a tributary of the Columbia River, in the U.S. state of Washington. Its entire course of 30 miles (48 km) lies within Skamania County. Crusattes River is an old variant name.
The Kalama River is a 45-mile (72 km) tributary of the Columbia River, in the U.S. state of Washington. It flows entirely within Cowlitz County, Washington. Calama River is an old variant name.
The Coweeman River is a tributary of the Cowlitz River, in the South West corner of the U.S. state of Washington. Its name comes from the Cowlitz word ko-wee-na, meaning "short one", referring to a short Indian who once lived along the river.
Bridge Creek is a 28-mile (45 km) tributary of the John Day River in the U.S. state of Oregon. Part of the drainage basin of the Columbia River, its watershed covers 267 square miles (690 km2) in Wheeler County.
The Elochoman River is a tributary of the Columbia River, in the U.S. state of Washington. It is about 15 miles (24 km) long.
The Muddy River is a stream, about 29 miles (47 km) long, southeast of Mount St. Helens in the U.S. state of Washington. The Muddy River flows south–southeast and joins the Lewis River just above the Swift Reservoir. The Lewis River flows west and is a tributary to the Columbia River. The east flank of Mount St. Helens is within the watershed of Muddy Creek.
The Green River is the largest tributary of the North Fork Toutle River in the U.S. state of Washington. Situated near Mount St. Helens in the Cascade Range in the southern part of the state, it flows generally west through Mount St. Helens National Volcanic Monument and industrial timberlands for 37.4 miles (60.2 km). The river drains more than 130 square miles (340 km2) in parts of three Washington counties: Skamania, Lewis, and Cowlitz.
The Ohanapecosh River is a 16-mile (26 km) river in the U.S. state of Washington.