Thelon
Thelon is a mapped river in the YearMaps hydrographic index. River courses organise settlement, agriculture and frontier-making more durably than any political boundary, and this reach is indexed against the dams, lakes and cities within its catchment.
- Feature Class
- River
- Coordinates
- 64.60°, -100.80°

About Thelon
The Thelon River (Inuktitut: Akilinik, lit. "on the other side") stretches 900 kilometres (560 mi) across northern Canada. Its source is Whitefish Lake in the Northwest Territories, and it flows east to Baker Lake in Nunavut. The Thelon ultimately drains into Hudson Bay at Chesterfield Inlet.
Encyclopedic summary adapted from Wikipedia: Thelon River (CC BY-SA 4.0).
Thelon in Depth
Geography
The drainage basin of the Thelon River encompasses some 142,400 square kilometres (55,000 sq mi). Located far from almost all human development, the Thelon and its surroundings are entirely pristine wilderness. It has been described as Canada's remotest river.
The river has a width of up to a kilometre (0.6 mi) along much of its lower section, widening into Beverly, Aberdeen, and Schultz Lakes about 100 kilometres (62 mi) upstream from its mouth at Baker Lake.
History
Inuit – including Caribou Inuit and Copper Inuit – have long occupied the sparsely populated lands around the Thelon. Artifacts of Inuit hunting and travel (including inukshuk guide stones) are readily observed near the river.
In 1770–71 English explorer Samuel Hearne crossed the Thelon while exploring Canada's northern interior. James William Tyrrell led an expedition through the area in 1900.
Over the winter of 1926–27 John Hornby starved to death on the Thelon along with two other men. They had planned to hunt migrating caribou, but failed to find the herd. Nevertheless, on the basis of Hornby's earlier explorations with James Charles Critchell Bullock in 1923, the Thelon Game Sanctuary was established in 1927, renamed the Thelon Wildlife Sanctuary in 1956.
Tourism
In 1990 the lower 545 kilometres (339 mi) of the Thelon were designated a Canadian Heritage River. Although there is no road access to the river, a number of wilderness campers and canoeists visit the Thelon every summer.
Sections adapted from Wikipedia: Thelon River (CC BY-SA 4.0).
Thelon: Key Facts
| Length | 904 km |
|---|---|
| Average discharge | 840 m³/s |
| Drainage basin | 142,400 km² |
| Source | Whitefish Lake |
| Mouth | Baker Lake |
| Drainage system | Hudson Bay drainage basin |
| Tributaries | Dubawnt River, Hanbury River, Mary Frances River, Tammarvi River, Kigarvi River, Finnie River, Clarke River |
Facts from Wikidata Q2416760 (CC0).
Major River Dossiers
Hand-written studies of the great river systems of history.
Connected Reaches
Nearby watercourses in the same drainage network.
Water Bodies in the Catchment
Settlements Along the Reach
Hydraulic Infrastructure Nearby
Surrounding Terrain
Thelon: Quick Answers
- Where is Thelon?
- Thelon is located in Canada, at 64.6041° N, 100.7950° W.
- Are there dams on the Thelon?
- No dam on the Thelon is recorded in the YearMaps dam index, which covers major structures only.