Yes, they are both provinces.
The province Alberta was created out of the Northwest Territories.
There is no province north of Alberta and Saskatchewan. However, there is the Northwest Territories that is north of the Alberta and Saskatchewan border.
The province of Alberta, Canada is bordered to the west by the province of British Columbia, to the east by Saskatchewan. The Northwest Territories, though not a province itself, borders Alberta to the north.
The provinces of Saskatchewan, Alberta and British Columbia share a border with the Northwest Territories along the 60th parallel of latitude.
Wood Buffalo Park in Alberta and The Northwest Territories
Great Bear lake
The Rocky Mountains extend into the provinces of British Columbia and Alberta, and the Yukon and Northwest Territories.
Both the Northwest Territories and British Columbia share borders with the Yukon and Alberta.
The Districts of Athabasca and Alberta formed the Province of Alberta and the Districts of Saskatchewan and Assiniboia formed the Southern half of Saskatchewan.
Northwest Territories is named, appropriately enough, Northwest Territories. It was transferred from Great Britain to Canada on July 15, 1870, the same day that Manitoba became a province. The expansions of Manitoba's boundaries were carved out of Northwest Territories. The provinces of Alberta and Saskatchewan were created out of Northwest Territories. Yukon and Nunavut were also created out of Northwest Teritories.
Yellowknife is the capital of Northwest Territories, but Northwest Territories is not a province. As the name indicates, Northwest Territories is a territory.
The Rocky Mountains extend into the provinces of British Columbia and Alberta, and the Yukon and Northwest Territories.