Denali (Mount McKinley): North America's Highest Peak

Denali (officially renamed from Mount McKinley in 2015), at 6,190 m (20,310 ft), is the highest mountain in North America and the third most prominent peak globally (after Everest and Aconcagua).

Geology and Structure

A massive granitic pluton uplifted by the subduction of the Pacific Plate under the North American Plate. Base-to-vertical-rise (~5,500 m / 18,000 ft) is the greatest of any mountain entirely above sea level. Heavily glaciated: over 40 named glaciers (Kahiltna, Ruth, Muldrow) carve its flanks.

Extreme Climate

• Summit average temperature: −29°C (−20°F); winter lows <−54°C (−65°F).
• Wind speeds >160 km/h (100 mph) common; wind chill −60°C (−76°F).
• Perpetual snow/ice above 4,500 m; extreme UV radiation.

Climbing Challenge

• Success rate: ~50% of ~1,200 annual attempts.
• Standard route: West Buttress (Kahiltna Glacier) — 3–4 weeks, high-altitude acclimatization, crevasse navigation, extreme cold.
• Hazards: Altitude sickness (low barometric pressure at high latitude), frostbite, avalanches, storms, crevasse falls.

Cultural Significance

Sacred to Koyukon Athabaskans ("Denali" = "The High One"). Centerpiece of Denali National Park and Preserve (2.4M hectares). Symbol of Alaskan wilderness and mountaineering aspiration.

Denali's combination of extreme latitude, elevation, and weather makes it a uniquely severe high-altitude environment—more akin to Himalayan 8,000-m peaks than other Seven Summits.