The lake fills the basin of the upper Peace River, backing into the Rocky Mountain Trench which is where the Parsnip and Finlay met at Finlay Forks to form the Peace. The lake includes three reaches, the Peace Reach (formerly the Peace Canyon), and the Parsnip and Finlay Reaches, which are the lowermost basins of those rivers, and covers a total area of Script error: No such module "convert"., being the largest lake in British Columbia and the seventh largest reservoir (by volume) in the world.
Several provincial parks are maintained on the shore of the lake, including Muscovite Lakes Provincial Park, Butler Ridge Provincial Park, Heather-Dina Lakes Provincial Park and Ed Bird-Estella Provincial Park.
The following rivers empty into the Williston Reservoir:
- Finlay River
- Omineca River
- Ingenika River
- Ospika River
- Parsnip River
- Manson River
- Nation River
- Clearwater Creek
- Nabesche River
- Carbon Creek
The reservoir was named after the Honourable Ray Gillis Williston, at the time the Minister of Lands, Forests and Water Resources.
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Cite error: The named reference
- Sekani Tribal Council. Carrier Chronology of Contact with Europeans-Euroamericans Archived at the Wayback Machine. Archive date 2006-11-18.
|40x40px||Wikimedia Commons has media related to Williston Lake.|
- BC Hydro. Williston Reservoir
- BC Hydro. Peace-Williston Fish and Wildlife Compensation Program
- "#REDIRECT [[Template:If empty]] *This is a redirect from a page that has been [[:Category:Redirects from moves|moved (renamed)]]. This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name. For more information follow the category link. [[Category:Redirects from moves]][[Category:Redirects from moves]]". BC Geographical Names. Wikilink embedded in URL title (help)
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