Denali, also called Mount McKinley (6,190m.), highest peak in North America. It is the third most topographically isolated peak after Mount Everest and Aconcagua. The mountain is essentially a giant block of granite that was lifted above Earth’s crust during a period of tectonic activity that began about 60 million years ago. It rises abruptly some 18,000 feet (5,500 metres) from Denali Fault at its base to the higher, more southerly of its two summits. The upper half of the mountain is covered with permanent snowfields that feed many glaciers, some surpassing 30 miles (48 km) in length.
Ability of a climber depending, Denali offer four routes, which are, I) West Buttress, ii) Muldrow Glacier, iii) West Rib, iv) Cassin Ridge. Nowadays, climbers prefer West Buttress route to top and it is the most popular of them all. Before West Buttress was popular Muldrow glacier route was viewed as standard route. Road following West Rib is tough and technically more difficult than the West Buttress. Cassin Ridge is the toughest of them all; this route is intended for top climbers only.
Basecamp is at 2200m on the southeast side of Kahitna Glacier. Climbers can reach to base camp by air from Talkeetna in Alaska. Other camps are set at 2380m, 2900m, 3350m, 4320m and 5240m respectively. Ranger stations are established at the basecamp and 4320m during climbing season, which starts from Earl May through July. Having said that, this route is not being technically difficult, it should not be misjudged.