The National Park to Park Highway was an auto trail in the United States in the 1910s and 1920s, plotted by A. L. Westgard. It followed a large loop through the West, connecting twelve National Parks: * Rocky Mountain National Park * Yellowstone National Park * Glacier National Park * Mount Rainier National Park * Crater Lake National Park * Lassen Volcanic National Park * Yosemite National Park * General Grant National Park (now part of Kings Canyon) * Sequoia National Park * Zion National Park * Grand Canyon National Park * Mesa Verde National Park