River mile
In the United States, a river mile is a measure of distance in miles along a river from its mouth.
River mile numbers begin at zero and increase further upstream.
The corresponding metric unit using kilometers is the river kilometer.
They are analogous to vehicle roadway mile markers, except that river miles are rarely marked on the physical river; instead they are marked on navigation charts, and topographic maps.
Riverfront properties are sometimes partially legally described by their river mile.
The river mile is not the same as the length of the river, rather it is a means of locating any feature along the river relative to its distance from the mouth, when measured along the course( or navigable channel) of the river.
River mile zero may not be exactly at the mouth.
For example, the Willamette River( which discharges into the Columbia River) has its river mile zero at the edge of the navigable channel in the Columbia, some beyond the mouth.
Also, the river mile zero for the Lower Mississippi River is located at Head of Passes, where the main stem of the Mississippi splits into three major branches before flowing into the Gulf of Mexico.
Mileages are indicated as AHP( Above Head of Passes) or BHP( Below Head of Passes).
Inner-Vikna
Inner- Vikna( sometimes" Indre Vikna") is the largest of the three major islands in the municipality of Nærøysund in Trøndelag county, Norway.
The island is located in the eastern part of the municipality and it includes the village of Rørvik, the administrative centre of Vikna.
Norwegian County Road 770 runs across the island, and also passing by Rørvik Airport, Ryum, then it continues over the Nærøysund Bridge and Marøysund Bridge to connect the island to the mainland.
The relatively flat and barren island is separated from the mainland by the Nærøysundet strait.
West Toad River
West Toad River is a River in Canada.
It is located in the province of British Columbia, in the central part of the country, 3 600 km west of the capital, Ottawa.
In the surroundings of the West Toad River grows mainly pine forests.
the area around West Toad River is almost uninhabited, with less than two inhabitants per square kilometer.
the neighborhood is part of the boreal climate zones.
annual average temperature is- 5 ° C. The warmest month is July, when the average temperature is 8 ° C, and the coldest is January, with- 18 ° c.
Pine Lake Aerodrome
Pine Lake Aerodrome formerly
Daughney Aerodrome is a registered aerodrome located near the Alaska Highway, west of Watson Lake, Yukon, Canada.
Toad River, British Columbia
Toad River, originally Toad's River Post, is a highway service community in northern British Columbia, Canada, located at historic Mile 422 on Highway 97, the Alaska Highway, near the confluence of the Toad and Racing Rivers.
The community primarily serves travelers and tourists with a highway maintenance station; a lodge with a restaurant, campground and gas station; a public telephone and a private 3000 foot airstrip.
The Toad River Lodge boasts a "world famous" collection of over 10,000 hats (2016) thumbtacked to the ceiling, many of them donated by passersby on the Alaska Highway.
Two miles north, The Poplars Campground offers camping, and motel rooms during the summer months (2011).
Whitehorse/Cousins Airport
Whitehorse/Cousins Airport is an unpaved airstrip located in Whitehorse, Yukon, Canada, northwest of the city centre between the Alaska Highway and the Yukon River.
This airport has no services at all, and is used primarily as an emergency landing area and for local pilot training.
Vehicles enter via Cousins Access Road.
The airport was built to support the Alaska Highway construction and the Northwest Staging Route.
Toad River (Minnesota)
Toad River is a stream in the U.S. state of Minnesota.
Toad River is an English translation of the native Ojibwe language name.
Rørvik Airport, Ryum
Rørvik Airport, Ryum is a regional airport located at Ryumsjøen, about south of the village of Rørvik in the municipality of Nærøysund in Trøndelag County, Norway.
The airport is owned and operated by the state- owned Avinor and serves the municipalities of Vikna and Nærøy.
The airport has a asphalt runway numbered 04 – 22.
Widerøe flies to the airport with its Bombardier Dash 8 aircraft on contract with the Ministry of Transport and Communications.
The airport opened in 1986 as a municipal airport.
It was first served by Norving, but Widerøe took over the flights in 1988.
The airport was nationalized in 1996.
Ryum served 33,532 passengers in 2014.
Toad River Formation
The Toad River Formation is a geologic formation in British Columbia.
It preserves fossils dating back to the Triassic period.
Toad River/Mile 422 (Alaska Highway) Airport
Toad River/ Mile 422( Alaska Highway) Airport,, is located adjacent to Toad River, British Columbia, Canada.

Question: Are both airports, Toad River/Mile 422 (Alaska Highway) Airport and Rørvik Airport, Ryum, located in the same country?
Answer: no