|Lake type||Fjord Lake, Monomictic, Oligotrophic|
|Primary inflows||Numerous Creeks|
|Primary outflows||Okanagan River|
|Catchment area||6,200 km2 (2,400 sq mi)|
|Max. length||135 kilometres (84 mi)|
|Max. width||5 kilometres (3.1 mi)|
|Surface area||351 square kilometres (136 sq mi)|
|Average depth||76 m (249 ft)|
|Max. depth||232 m (761 ft)|
|Water volume||24.6 cubic kilometres (5.9 cu mi)|
|Residence time||52.8 years|
|Shore length1||270 kilometres (170 mi)|
|Surface elevation||342 m (1,122 ft)|
|Islands||Rattlesnake Island, Grant Island|
|Settlements||Vernon, Lake Country, Kelowna, West Kelowna, Peachland, Summerland, Penticton|
|1 Shore length is not a well-defined measure.|
Okanagan Lake is composed of three basins: a larger north basin, a central or mid basin, and a southern basin. The lake is drained by the Okanagan River, which exits the lake's south end via a canal through the city of Penticton to Skaha Lake, from whence the river continues southwards into the rest of the South Okanagan and through Okanogan County, Washington to its confluence with the Columbia.
The lake's maximum depth is 232 metres near Grant Island (also called "Whiskey Island" or "Seagull Island" by locals). There is one other island known as Rattlesnake Island, much farther south by Squally Point. Some areas of the lake have up to 750 metres of glacial and post-glacial sediment fill which were deposited during the Pleistocene Epoch.
Notable features of the Okanagan Valley include terraces which were formed due to the periodic lowering of the lake's predecessor, glacial Lake Penticton. These terraces are now used extensively for agriculture such as fruit cultivation.
Cities bordering the lake include Vernon in the north, Penticton in the south, Kelowna and West Kelowna in the centre, as well as the smaller municipalities of Lake Country (north of Kelowna), Peachland (south of West Kelowna), and Summerland (north-west of Penticton).
The five-lane William R. Bennett Bridge, a floating bridge with a high boat passage arch connects Kelowna to the district of West Kelowna and the community of Westbank. This bridge replaced the three-lane floating Okanagan Lake Bridge on May 30, 2008 which had a lift span for passage of large boats.
Many parks and beaches are found along the shores of the lake, which make boating and swimming very popular activities. The lake is home to several species of fish, including rainbow trout and kokanee. It is said by some to be home to its own lake monster - a giant serpent-like creature named Ogopogo.
- Okanagan Falls
- Okanagan people
- Okanagan Trail
- List of tributaries of the Columbia River
- Kelowna Hydrofest
- Skaha Lake
- Summerhill Pyramid Winery
- Eyles, N., Mullins, H.T., and Hine, A.C. (1990). "Thick and fast: Sedimentation in a Pleistocene fiord lake of British Columbia, Canada". Geology 18 (11): 1153–1157. Bibcode:1990Geo....18.1153E. doi:10.1130/0091-7613(1990)018<1153:TAFSIA>2.3.CO;2.
- "Okanagan Lake". BC Geographical Names. http://apps.gov.bc.ca/pub/bcgnws/names/20383.html.
- Anonymous (1974a). Limnology of the Major Lakes in the Okanagan Basin. Canada - British Columbia Okanagan Basin Agreement, Final Report, Technical Supplement V. British Columbia Water Resources Service, Victoria, British Columbia, 261 pp.
- Anonymous (1974b). The Main Report of the Consultative Board. Canada - British Columbia Okanagan Basin Agreement. British Columbia Water Resources Service, Victoria, British Columbia.
- Stockner J.G., Northcote T.G. (1974). "Recent limnological studies of Okanagan Basin lakes and their contribution to comprehensive water resource planning". Journal of the Fisheries Research Board of Canada 31: 955–976. doi:10.1139/f74-111.
- "Okanagan Lake". World Lakes Database. International Lake Environment Committee Foundation. Retrieved 2006-05-12.