Yellowstone National Park na-ekpuchi mpaghara nke 3,468.4 square miles (8,983 km2), nke gụnyere ọdọ mmiri, ndagwurugwu, osimiri na ugwu ugwu. Ọdọ mmiri Yellowstone bụ otu n'ime ọdọ mmiri kachasị elu na North America ma na-elekwasị anya na Yellowstone Caldera, nnukwu ugwu mgbawa kachasị ukwuu na kọntinent ahụ. A na-ewere caldera dị ka ugwu mgbawa na-arụ ọrụ. O jiriwo ike dị ukwuu gbapụta ọtụtụ ugboro n'ime nde afọ abụọ gara aga. Ọkara nke geysers na hydrothermal atụmatụ ụwa dị na Yellowstone, nke ọkụ ọkụ a na-aga n'ihu na-eme ka ọ dịkwuo ọkụ.
3,468.4