Gregoire Lake is a lake in Alberta, Canada. It is part of the Athabasca River basin.

Gregoire Lake
A beach at Gregoire Lake Provincial Park
Gregoire Lake
Location	Wood Buffalo, Alberta
Coordinates	56°27′06″N 111°07′38″W / 56.45167°N 111.12722°W / 56.45167; -111.12722
Type	eutrophic
Primary outflows	Gregoire River
Catchment area	232 km2 (90 sq mi)[1]
Basin countries	Canada
Max. length	9.3 km (5.8 mi)
Max. width	4.6 km (2.9 mi)
Surface area	25.8 km2 (10.0 sq mi)[1]
Average depth	3.9 m (13 ft)
Max. depth	7.2 m (24 ft)
Surface elevation	480 m (1,570 ft)

It is located in the wetlands of northern Alberta, adjacent to Highway 881, between Fort McMurray and Lac La Biche. It was known as "Willow Lake" until 1940 when the name was changed to "Gregoire Lake".^[2]

The lake has a total area of 25.8 km² (10.0 sq mi) and lies at an elevation of 480 m (1,570 ft). It has a maximum depth of 7.2 m (24 ft) and an average depth of 3.9 m (13 ft).^[1]

Gregoire Lake Provincial Park is established on the northern shore of the lake, which is a traditional territory of Woodland Cree and Chipewyan First Nations.^[2]