California 23 Alaska 22 Arizona 21 Nevada 15 North America 13 United States 9 Montana 8 Sierra Nevada (Calif. and Nev.) 8 Colorado 6 Middle Atlantic States 6 Utah 6 West (U.S.) 6 East (U.S.) 4 Texas 4 Virginia 4 Wyoming 4 California, Southern 3 China 3 Colorado River Watershed (Colo.-Mexico) 3 Klamath Mountains (Calif. and Or.) 3 Mexico 3 North Carolina 3 San Juan Basin (N.M. and Colo.) 3 Santa Cruz County 3 Arkansas 2 Atlantic Coast (U.S.) 2 Baboquivari Mountains 2 British Columbia 2 Carlin region 2 Elko County 2 Elko Region 2 Hopewell Region 2 Illinois Basin 2 India 2 Kansas 2 Missouri 2 New Jersey 2 New Mexico 2 New York (State) 2 Northeastern States 2 Pakistan 2 Roskruge Mountains 2 Ruby Range 2 San Andreas Fault (Calif.) 2 San Jose Region 2 Santa Maria Basin 2 Santa Rita Mountains 2 Sierrita Mountains 2 Southwest, New 2 Washington (State) 2 Wrangell Mountains 2 Africa 1 Alaska Peninsula 1 Alps 1 Anchorage 1 Anchorage Region 1 Andrus Canyon 1 Asia, Central 1 Atlantic Coast 1 Atlantic Provinces 1 Australia 1 Baja California (Peninsula) 1 Canada 1 Canelo Hills 1 Chelan County 1 Chesapeake and Ohio Canal National Historical Park 1 Coast Ranges 1 Cochise County 1 Colfax County 1 Colorado River Region (Colo.-Mexico) 1 Comobabi Mountains 1 Dakota Territory 1 De Long Mountains 1 Eurasia 1 Florida 1 Fort Belknap Indian Reservation 1 Four Corners Region 1 Frontier Formation 1 Greenland 1 Huachuca Mountains 1 Humboldt Range 1 Idaho 1 Imperial County 1 Inyo County 1 Katmai National Park and Preserve Region 1 Kohat District 1 Liaoning Sheng 1 Lubbock Region 1 Manitoba 1 Maritime Provinces 1 Massachusetts 1 Mediterranean Region 1 Mexico, North 1 Michigan Basin (Mich. and Ont.) 1 Middle West 1 Misheguk Mountain 1 Mississippi County 1 Mississippi Embayment 1 Mohave County 1 Moon 1