Mesa Verde 1906 Colorado 52,122 11. Now part of Chickasaw National Recreation Area. Glacier 1910 Montana 1,013,572 13. Rocky Mountain 1915 Colorado 265,727 14. Hawaii 209,695 15.
All acreages listed are the parks' current size.
Most were much smaller when they were originally established. It depends on how you look at it. If you only consider existing national parks, Crater Lake could be numbered as high as the fifth national park. If you stick to the original list, regardless of present status, Crater Lake was the seventh national park to be established.