Lake Nosbonsing

Lake Nosbonsing (French: Lac Nosbonsing) is a lake in the municipalities of Bonfield, Chisholm, and East Ferris in Nipissing District in Northeastern Ontario, Canada.[1] It is near the City of North Bay, is the source of the Kaibuskong River, and is in the Saint Lawrence River drainage basin.

Lake Nosbonsing
Astorville at the western end of the lake
Lake Nosbonsing Location in Ontario
Location	Nipissing District, Ontario
Coordinates	46°12′09″N 79°12′31″W[1]
Type	Lake
Part of	Saint Lawrence River drainage basin
Primary inflows	Depot Creek
Primary outflows	Kaibuskong River
Basin countries	Canada
Max. length	11 kilometres (6.8 mi)
Max. width	5 kilometres (3.1 mi)
Surface elevation	237 metres (778 ft)[2]
Islands	Perron Island
Settlements	Astorville, Bonfield, Nosbonsing

The primary inflow, at the south, is Depot Creek. The primary outflow, at the northeast, is the Kaibuskong River, which flows via the Mattawa River and the Ottawa River to the Saint Lawrence River.

The middle and west of the lake are in East Ferris;[3] the east of the lake is in Bonfield;[4] and a small portion of the very south centre of the lake is in Chisholm.[5] There are three named communities on the lake: Astorville, at the western tip, and Nosbonsing at the north, both in East Ferris; and Bonfield, at the northeast at the outflow of the Kaibuskong River, in Bonfield. The original Canadian Pacific Railway transcontinental main line runs along the northeast shore from the communities of Bonfield to Nosbonsing. There is one named island, Perron Island, in the west part of the lake; and two named points: Shields Point and McConnell Point, both on the north shore.