MAP ACTIVITYMap 21.1 National Parks and Forests The national park system in the West began with Yellowstone in 1872. Grand Canyon, Yosemite, Kings Canyon, and Sequoia followed in the 1890s. During his presidency, Theodore Roosevelt added six parks—Crater Lake, Wind Cave, Petrified Forest, Lassen Volcanic, Mesa Verde, and Zion.READING THE MAP: Collectively, do national parks or national forests encompass more land? According to the map, how many national parks were created before 1910? How many were created after 1910?CONNECTIONS: How do conservation and preservation differ? Why did Roosevelt believe that saving land in the West was important? What principles guided the national land use policy of the Roosevelt administration?