Alberta is one of the thirteen provinces and territories of Canada. Located in Western Canada, the province has an area of 661,190 km² (255,290 sq mi) and is bounded to the south by the United States state of Montana along 49° north for 298 km (185 mi); to the east at 110° west by the province of Saskatchewan for 1,223 km (760 mi); and at 60° north the Northwest Territories for 644 km (400 mi). The southern half of the province borders British Columbia along the Continental Divide of the Americas on the peaks of the Rocky Mountains, while the northern half borders British Columbia along the 120th meridian west. Along with Saskatchewan it is one of only two landlocked provinces or territories.

Alberta's landscape is marked by the impact of the Wisconsin Glaciation, about 75,000 to 11,000 years ago, when the entire future province was covered in ice. As the ice sheet receded, the landscape was changed, and large amounts of glacial till were left behind.

The southern portion consists chiefly of plains that are almost entirely treeless. As the slopes of the Rocky Mountains to the west are reached, more trees are found until in the foothills of the mountains, bodies of forest timber occur. Trees also become more numerous in the northern part of the province, until in the region north of the North Saskatchewan River continuous forests are met with again. From the southern boundary line for 2.5° north the prairie is dry, but of good soil, which grows excellent crops when irrigated. North of this region, the surface of the province is of the most fertile soil, with ordinary rainfall sufficing for agriculture. Alberta also has large oil reserves, especially in the Athabasca oil sands in the north of the province.

The appearance of the prairie section of the province is that of undulating grasslands, with rounded sloping ridges covered with shorter grasses, which serve for the support of large herds of beef cattle. The wooded portions of the terrain are dotted with clumps and belts of trees of moderate size, giving them a park-like appearance. In winter it is generally very cold, but this is occasionally reduced by a warm wind from the west, known as the Chinook.

In 1986, Agriculture Canada published a map listing the following physiographic regions to be present at least partially within Alberta:

From a distance of about 100 km (62 mi) the mountains are constantly in view in clear weather. They appear as a line of snowy peaks along the western horizon. This continues for hundreds of kilometres northwestward. The Canadian Rockies are ascended by a gradual approach from the east, but are exceedingly abrupt on their transalpine slope in British Columbia. The peaks of these mountains are majestic, many of them reaching a height of more than 3,000 m (9,800 ft) above the sea. Among the more notable of these are:

Historical travelling through these mountains was difficult, and alpine passes became very important. The most noted of the Alberta passes are:

The Caribou Mountains are not part of the Canadian Rockies, but are located in the northern Alberta, constituting an elevated plateau in the northern plains. They reach an altitude of 1,030 m (3,380 ft), almost 700 m (2,300 ft) higher than the surrounding area.