The original road built in 1920 to link Banff and Lake Louise, 30 miles [48.3 kilometers] away, has become a relaxed alternative to the more recent Trans-Canada 1, a busy road used by heavy trucks. Numerous turnoffs offer views of the valley and its dramatic mountain backdrop, and there is a chance of encountering wildlife such as caribou, deer, or moose.
At Johnston Canyon, 16 miles [25.8 kilometers] from Banff, Johnston Creek has eroded a deep cleft in the limestone, which is made accessible by a carefully constructed catwalk. Waterfalls occur where the flow of water encounters layers of harder dolomite, as at the 50-foot-high [15.2-meter-high] Lower Falls (just over 0.5 mile [0.8 kilometer] from the parking lot) and at the 100-foot [30.5-meter] Upper Falls (just over 1 mile [1.6 kilometer]). Farther still (3.5 miles [5.6 kilometers] from the parking lot) are the Ink Pots, a series of cold-water springs, normally clear blue in color, but sometimes changing to an inky black.
Continuing along the walkway as far as Castle Junction, the serrated mountains to the northeast belong to the distinctive Sawback Range, which make up part of the front ranges of the Rocky Mountains. At Castle Junction, the fault line is crossed, separating the front ranges from the eastern main ranges to the west. Part of the eastern main range, the great landmark of Castle Mountain (9,075 feet; 2,766.1 meters), 21 miles [33.8 kilometers] northwest of Banff, is a supreme example of a castellated mountain, with its typical layer cake appearance produced by a series of cliffs and ledges. CONTINUED