The Rapid River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Yukon

Yukon

Yukon is the westernmost and smallest of Canada's three federal territories. It was named after the Yukon River. The word Yukon means "Great River" in Gwich’in....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 and Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Etymology

The stream was published as Sucker River by the U.S. Coast and Geodetic Survey (USC&GS) in 1890. The current name was mentioned by R. G. McConnell of the Geological Survey of Canada in 1888. It was so named because of the "boulder stream rapids that extend three quarters of a mile up stream from its mouth."

Hydrology

The source of the Rapid River is on the slopes of Lahchah Mountain at an elevation of 745 metres (2,444 ft), about 40 kilometres (25 mi) northwest of Old Crow

Old Crow, Yukon

-Population data:-External links:******, a National Film Board of Canada documentary...

. The river travels 15 kilometres (9 mi) west to reach the United States border, where it crosses into Yukon–Koyukuk Census Area, Alaska at 67°38′30"N 141°00′00"W at an elevation of 476 metres (1,562 ft). The river reaches its mouth at the Porcupine River

Porcupine River

The Porcupine River is a river that runs through Alaska and the Yukon. Having its source in the Ogilvie Mountains north of Dawson City, Yukon, it flows north, veers to the southwest, goes through the community of Old Crow, Yukon, flowing into the Yukon River at Fort Yukon, Alaska...

 at an elevation of 197 metres (646 ft), 12.8 kilometres (8 mi) north of the settlement of Old Rampart.