Rocky Mountains Land Coverage: 5%, Not 40%

Correcting the Rocky Mountains' Land Area

The Rocky Mountains cover approximately 5% of the North American land surface, not 40%.

Extent

• Length: ~4,800 km (3,000 mi) from northern British Columbia/Yukon to New Mexico.
• Width: 120–650 km (75–400 mi).
• Area: ~990,000 km² (382,000 sq mi).
• North America total area: ~24.7 million km².
• Proportion: ~4–5%.

Why the 40% Figure Is Wrong

It may confuse the Rockies with the broader North American Cordillera (all western mountain ranges) or the Continental Divide corridor. The Rockies are a major but not dominant fraction of the continent.

Key Subranges

• Canadian Rockies (BC/Alberta)
• U.S. Northern Rockies (Idaho, Montana, Wyoming)
• Central Rockies (Colorado—highest peaks)
• Southern Rockies (New Mexico)

The Rockies are iconic, but they occupy a modest slice of the continent's vast plains, shields, and coastal regions.