How Big Is Grand Canyon National Park? Area, Length, Width & Depth

Per the National Park Service:

• Area: 1,217,282 acres (4,926 km²).
• Length along Colorado River: 277 miles (446 km).
• Width: 4–18 miles (6–29 km) rim-to-rim.
• Average depth: ~1 mile (1.6 km).
• Maximum depth: >1.8 miles (2.9 km).

The park protects not just the iconic gorge but vast side canyons, plateaus, and diverse ecosystems from desert scrub to subalpine forest.