The Columbia River is the largest river in the Pacific Northwest region of North America. The river forms in the Rocky Mountains of British Columbia, Canada. It flows northwest and then south into the U.S. state of Washington, then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean. The river is 1,243 miles long, and its largest tributary is the Snake River. Its drainage basin is roughly the size of France and extends into seven states of the United States and one Canadian province. The fourth-largest river in the United States by volume, the Columbia has the greatest flow of any river entering the Pacific outside of Asia, and the 36th greatest discharge of any river in the world.
The Snake River is a major river in the interior Pacific Northwest region of the United States. About 1,080 miles (1,740 km) long, it is the largest tributary of the Columbia River, which is the largest North American river that empties into the Pacific Ocean. Beginning in Yellowstone National Park, western Wyoming, it flows across the arid Snake River Plain of southern Idaho, the rugged Hells Canyon on the borders of Idaho, Oregon and Washington, and finally the rolling Palouse Hills of southeast Washington. It joins the Columbia River just downstream from the Tri-Cities, Washington, in the southern Columbia Basin.
The Yakima River is a tributary of the Columbia River in south central and eastern Washington state, named for the indigenous Yakama people. Lewis and Clark mention in their journals that the Chin-nâm pam called the river Tâpe têtt, possibly from the French tape-tête, meaning "head hit". The length of the river from headwaters to mouth is 214 miles (344 km), with an average drop of 9.85 feet per mile (1.866 m/km). It is the longest river entirely in Washington state.
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.
Rocky Reach Dam is a run-of-the-river hydroelectric dam in the U.S. state of Washington owned and operated by Chelan County Public Utility District. It has 11 generators rated in total 1300 MW. The project is on the Columbia River in north central Washington state about seven miles (11 km) upstream from the city of Wenatchee. The dam is 473 miles (761 km) above the mouth of the Columbia. The reservoir impounded by the dam is Lake Entiat. The project provides energy for more than 7 million people throughout the Pacific Northwest.
The Wenatchee River is a river in the U.S. state of Washington, originating at Lake Wenatchee and flowing southeast for 53 miles (85 km), emptying into the Columbia River immediately north of Wenatchee, Washington. On its way it passes the towns of Plain, Leavenworth, Peshastin, Dryden, Cashmere, Monitor, and Wenatchee, all within Chelan County. The river attracts kayaking and river rafting enthusiasts and tourism.
The Pend Oreille River is a tributary of the Columbia River, approximately 130 miles (209 km) long, in northern Idaho and northeastern Washington in the United States, as well as southeastern British Columbia in Canada. In its passage through British Columbia its name is spelled Pend-d'Oreille River. It drains a scenic area of the Rocky Mountains along the U.S.-Canada border on the east side of the Columbia. The river is sometimes defined as the lower part of the Clark Fork, which rises in western Montana. The river drains an area of 66,800 square kilometres (25,792 sq mi), mostly through the Clark Fork and its tributaries in western Montana and including a portion of the Flathead River in southeastern British Columbia. The full drainage basin of the river and its tributaries accounts for 43% of the entire Columbia River Basin above the confluence with the Columbia. The total area of the Pend Oreille basin is just under 10% of the entire 258,000-square-mile (670,000 km2) Columbia Basin. Box Canyon Dam is currently underway on a multimillion-dollar project for a fish ladder.
The Okanogan River is a tributary of the Columbia River, approximately 115 mi (185 km) long, in southern British Columbia and north central Washington. It drains a scenic plateau region called the Okanagan Country east of the Cascade Range and north and west of the Columbia, and also the Okanagan region of British Columbia. The Canadian portion of the river has been channelized since the mid-1950s.
The Skookumchuck River is a 45-mile (72 km) long river located in southwest Washington, United States. It is a tributary of the Chehalis River and thence to the Pacific Ocean. The Skookumchuck Dam was built in 1970, creating the Skookumchuck Reservoir. The dam provides water supply for the 1400-megawatt Centralia Steam Electric Plant and supplements flows for fish resources. The river begins with several tributaries in the Snoqualmie National Forest in the foothills of the Cascade Mountains, and flows west past the town of Bucoda, Washington to its confluence with the Chehalis River near Centralia, Washington.
The Palouse River is a tributary of the Snake River in Washington and Idaho, in the northwest United States. It flows for 167 miles (269 km) southwestwards, primarily through the Palouse region of southeastern Washington. It is part of the Columbia River Basin, as the Snake River is a tributary of the Columbia River.
Lake Entiat is a reservoir between Chelan County and Douglas County in North Central Washington, USA, that is formed above Rocky Reach Dam, a hydroelectric dam on the Columbia River. The reservoir is 17 mi (27 km) north of Wenatchee and stretches upstream to the Wells Dam. Lincoln Rock State Park is on its south shore.
Crab Creek is a stream in the U.S. state of Washington. Named for the presence of crayfish, it is one of the few perennial streams in the Columbia Basin of central Washington, flowing from the northeastern Columbia River Plateau, roughly 5 km (3.1 mi) east of Reardan, west-southwest to empty into the Columbia River near the small town of Beverly. Its course exhibits many examples of the erosive powers of extremely large glacial Missoula Floods of the late Pleistocene, which scoured the region. In addition, Crab Creek and its region have been transformed by the large-scale irrigation of the Bureau of Reclamation's Columbia Basin Project (CBP), which has raised water table levels, significantly extending the length of Crab Creek and created new lakes and streams.
The Kettle River is a 281-kilometre (175 mi) tributary of the Columbia River, encompassing a 10,877-square-kilometre (4,200 sq mi) drainage basin, of which 8,228 square kilometres (3,177 sq mi) are in southern British Columbia, Canada and 2,649 square kilometres (1,023 sq mi) in northeastern Washington, US.
The Entiat River is a tributary of the Columbia River, joining the Columbia near Entiat. The United States Geological Survey (USGS) lists two variant names for the Entiat River: En-ti-at-kwa River and Entiatqua River. The river's name is derived from the Columbia-Moses (Salishan) term /nt'yátkw/ [nt'iátkw], meaning "place of grassy water"; another source states that it was called Enteatqua which means "Rapid Water" or "Rushing Water." The name, spelled "Entiat", was selected for the river in 1958 by the Chelan County Public Utility District.
The Chiwawa River is a tributary of the Wenatchee River, in the U.S. state of Washington. It is completely contained within Chelan County.
Seven Fingered Jack is a mountain in the North Cascades in the U.S. state of Washington. It is located at the north end of the Entiat Mountains, a sub-range of the Cascade Range. It is part of a three-peak group called the Entiat Cirque which includes Mount Maude and Mount Fernow. Seven Fingered Jack is about 4 miles (6.4 km) south of Holden. The peak is in the Glacier Peak Wilderness of Wenatchee National Forest.
The Entiat Mountains, or Entiat Range, is a mountain range in the U.S. state of Washington. Located west of the Columbia River, north of the Wenatchee River, and south of the Entiat River, the range is part of the North Cascades section of the Cascade Range. The Entiat Range is relatively narrow east to west and long north to south. The Entiat River valley separates the Entiat Mountains from the Chelan Mountains to the northeast. To the west and south, across the Wenatchee River and tributaries such as the Chiwawa River are the Wenatchee Mountains.
Icicle Creek is a non navigable stream in the U.S. state of Washington. It originates at Josephine Lake near the crest of the Cascade Range and flows generally east to join the Wenatchee River near Leavenworth. Icicle Creek's drainage basin is mountainous and mostly undeveloped land within the Wenatchee National Forest and the Alpine Lakes Wilderness. The final 6 miles (10 km) of the creek are moderately developed with scattered homes and pasture, a golf course, children's camp, a small housing development called Icicle Island Club, and the Leavenworth National Fish Hatchery. Some water is diverted from the creek for municipal use by the City of Leavenworth at Icicle Creek river mile 5.6. Near Leavenworth, the wheelchair-accessible Icicle Creek Nature Trail, a National Recreation Trail designated in 2005, runs 1.0 mile (1.6 km) along a historic creek channel.
Ardenvoir is an unincorporated community in Chelan County, Washington, United States. Ardenvoir is 9 miles (14 km) west-northwest of Entiat. Ardenvoir has a post office with ZIP code 98811.
