Mount Johnson is an 8,400+ ft (2,560+ m) mountain summit located in the Alaska Range, in Denali National Park and Preserve, in Alaska, United States. It is situated on the west side of the Ruth Gorge, 15 miles (24 km) southeast of Denali and six miles (9.7 km) south-southwest of The Moose's Tooth. The nearest higher neighbor is Mount Wake, 0.69 miles (1.11 km) to the northwest.

Despite its relatively low elevation, it is notable for its north face with over 4,000 feet of vertical sheer granite with climbing routes called the Escalator and Stairway to Heaven. The first ascent of the peak was made in 1979 by Gary Bocarde, Charlie Head, John Lee, and Jon Thomas via the south ridge. The mountain was named by famed explorer Dr. Frederick Cook who claimed the first ascent of Mount McKinley in 1906, but was later disproved. Emory Richard Johnson (1864–1950) was the president of the Geographical Society of Philadelphia (1898–1912) at the time that Cook explored Ruth Gorge in 1906.

Based on the Köppen climate classification, Mount Johnson is located in an alpine climate zone with long, cold, snowy winters, and cool summers. Winter temperatures can drop below −10 °F with wind chill factors below −20 °F. The months May through June offer the most favorable weather for climbing or viewing.

• Mountain peaks of Alaska
• Geology of Alaska

• 2024 fatality: National Park Service
• NOAA weather: Talkeetna
• Localized weather: Mountain Forecast
• YouTube: First ascent of Stairway to Heaven route
• Mts. Johnson and Wake: Flickr