The Snoqualmie River is a 45-mile (72 km) long river in King County and Snohomish County in the U.S. state of Washington. The river's three main tributaries are the North, Middle, and South Forks, which drain the west side of the Cascade Mountains near the town of North Bend and join near the town of Snoqualmie just above the Snoqualmie Falls. After the falls the river flows north through rich farmland and the towns of Fall City, Carnation, and Duvall before meeting the Skykomish River to form the Snohomish River near Monroe. The Snohomish River empties into Puget Sound at Everett. Other tributaries of the Snoqualmie River include the Taylor River and the Pratt River, both of which enter the Middle Fork, the Tolt River, which joins at Carnation, and the Raging River at Fall City.
The Big River is a tributary of the Coast Fork Willamette River, approximately 12 miles (19 km) long, in western Oregon in the United States. It drains an area of the Calapooya Mountains south of Eugene.
The Dirty Devil River is an 80-mile-long (130 km) tributary of the Colorado River, located in the U.S. state of Utah. It flows through southern Utah from the confluence of the Fremont River and Muddy Creek before emptying into the Colorado River at Lake Powell.
The Nooksack River is a river in the northwest part of the U.S. state of Washington. It drains an area of the Cascade Range around Mount Baker, near the Canada–US border. The lower river flows through a fertile agricultural area before emptying into Bellingham Bay and, via the Strait of Juan de Fuca and the Strait of Georgia, the Pacific Ocean. The river begins in three main forks, the North Fork, Middle Fork, and South Fork. The North Fork is sometimes considered the main river. Including the North Fork, the Nooksack is approximately 75 miles (121 km) long. All three forks originate in the Mount Baker Wilderness.
The Klickitat River is a tributary of the Columbia River, nearly 96 miles (154 km) long, in south-central Washington in the United States. It drains a rugged plateau area on the eastern side of the Cascade Range northeast of Portland, Oregon. In 1986, 10 miles (16 km) of the river were designated Wild and Scenic from the confluence with Wheeler Creek, near the town of Pitt, to the confluence with the Columbia River.
The Mamquam River is a c.35 km tributary of the Squamish River.
The Salmon River is a 33.5-mile (53.9 km) river in the Cascade Range in the U.S. state of Oregon that drains part of southwestern Mount Hood. The entire length of the river is a protected National Wild and Scenic River. Several portions are in protected wilderness. It is affluent to the Sandy River, a tributary of the Columbia River.
The Miller River is a river in King County, Washington. Named for 1890s prospector John Miller, it is a tributary of the Skykomish River, which it joins near the community of Miller River. The Miller River is about 3.5 miles (5.6 km) long from the confluence of its main tributaries, the East Fork and West Fork. Miller River Campground is located just downriver from the confluence.
Sloan Creek is the largest tributary of the North Fork Sauk River, entering the river about 2.1 miles (3.4 km) above the mouth of Lost Creek. Its only major tributary is Cadet Creek, which enters the creek about 1.8 miles (2.9 km) above its mouth. According to Fred Beckey, Cadet Creek is larger than Sloan Creek and could be equally considered the head of the Sauk River as the North Fork itself.
The Mashel River is a river in Pierce County, in the U.S. state of Washington. It is a tributary of the Nisqually River, which it enters about 3.6 miles (5.8 km) northwest of Eatonville, at Nisqually river mile 39.6.
Ashlu Creek is a short and swift river-like creek in British Columbia. It is a tributary of the Squamish River and enters it about 24.3 km northwest of Squamish.
Sulphide Creek is a 2.5-mile (4.0 km) glacial tributary of the Baker River in Whatcom County in the U.S. state of Washington, draining a steep and narrow canyon on the southeast flank of Mount Shuksan, inside North Cascades National Park. Although called a creek, it is river-like due to its high volume. The creek is fed by the "massive" Sulphide and Crystal glaciers above Sulphide Lake and it runs east collecting several small tributaries before flowing into the Baker River at elevation 869 feet (265 m). There are several very tall waterfalls occurring on the creek and its tributaries, the largest of which is Sulphide Creek Falls.
The Satsop River is a stream in the U.S. state of Washington. It has three main tributary forks, the East Fork, West Fork, and Middle Fork Satsop Rivers. The main stem Satsop River is formed by the confluence of the West and East Forks. The Middle Fork is a tributary of the East Fork. The three forks are much longer than the main stem Satsop itself, which flows south from the confluence only a few miles to join the Chehalis River near Satsop, Washington. Other significant tributaries include the Canyon River and Little River, both tributaries of the West Fork Satsop, and Decker Creek, a tributary of the East Fork Satsop River. The Satsop River's major tributaries originate in the Olympic Mountains and its southern foothills, the Satsop Hills, within Grays Harbor and Mason counties. Most of the Satsop River's watershed consists of heavily wooded hill lands. The upper tributaries extend into Olympic National Forest, approaching but not quite reaching Olympic National Park.
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 South Fork Coquille River is the longest tributary of the Coquille River in coastal Oregon in the United States. From its headwaters in the Southern Oregon Coast Range, the river flows northwest to join the North Fork Coquille River at Myrtle Point, forming the main stem Coquille. The South Fork is about 63 miles (101 km) long, and its watershed drains roughly 288 square miles (750 km2) of rural Coos County.
The Rice Fork is a 22.7-mile-long (36.5 km) tributary of the Eel River in Lake County, California. The Rice Fork begins on the upper northwest side of Goat Mountain, on the Colusa-Lake County line, at an elevation of over 6,000 feet (1,800 m). It quickly descends the steep western slope of the mountain, then bends northward, and flows northwesterly down a narrow winding steep walled canyon for about 18 miles (29 km), crossing two forest roads and adding many tributaries, ending its journey at the southern tip of Lake Pillsbury, at a varied elevation around 1,800 feet (550 m), depending on the lake level. Before the construction of Scott Dam in the 1920s, which formed Lake Pillsbury, the Rice Fork ran directly into the Eel River. It is one of Lake County's longest streams.
Mosby Creek is a 21-mile (34 km) tributary of the Row River in Lane County, in the U.S. state of Oregon. It begins at the confluence of the east and west forks of the creek near the Calapooia Divide and the border with Douglas County. From its source it flows generally north-northwest to meet the river slightly east of Cottage Grove and about 4 miles (6 km) from the larger stream's confluence with the Coast Fork Willamette River.
The North Fork Owyhee River is a tributary, about 30 miles (48 km) long, of the Owyhee River in Malheur County, Oregon, and Owyhee County, Idaho, in the United States. It begins on the east flank of the Owyhee Mountains in Idaho and flows generally southwest to meet the main stem at Three Forks, Oregon, 161 miles (259 km) above the confluence of the larger river with the Snake River.
The Little Pudding River is a tributary of the Pudding River in Marion County in the U.S. state of Oregon. It begins in the Waldo Hills near Macleay, east of Salem, and flows generally north to meet the larger river west of Mt. Angel. The confluence is about 37 miles (60 km) from the Pudding River's mouth on the Molalla River.
Wildhorse Creek is a tributary of Alvord Lake in Harney County in the U.S. state of Oregon. It originates at a spring on Steens Mountain and flows generally south through Wildhorse Canyon to the shallow alkaline lake, south of the Alvord Desert and north of the unincorporated community of Fields.
