The Brent crater is an impact crater in both the geographic township of Deacon, Unorganized South Nipissing District and the municipal township of Papineau-Cameron in Nipissing District, northeastern Ontario, Canada,[1] located north of Cedar Lake in northern Algonquin Provincial Park.

[5] The crater can be reached using Brent Road, 32 kilometres (20 mi) south of Ontario Highway 17.

[4] A sign, erected at the site by the Archeological and Historic Sites Board, Archives of Ontario, reads: The Brent Crater: First recognized in 1951 from aerial photographs, the crater is a circular depression about two miles in diameter formed in Precambrian crystalline rocks.

It is calculated that the impact released energy equaling 250 megatons of TNT and occurred about 450 million years ago when this area was probably covered by a shallow sea.

The crater lies in the Ottawa-Bonnechere Graben, a 452 million year old rift valley.