Keeping Public Lands Open Act - Provides that if an appropriations measure for a covered account for a fiscal year is not enacted before the beginning of that fiscal year and a joint resolution making continuing appropriations for such account is not in effect, such sums as necessary shall be made available without further appropriation to continue any activity for which funds were provided from such account in the preceding fiscal year.
Defines "covered account" to mean specified appropriation accounts of: (1) the Department of the Interior for the U.S. Fish and Wildlife Service, including amounts for activities of the National Wildlife Refuge System, habitat conservation, the Migratory Bird Conservation Account, the North American Wetlands Conservation Fund, the National Fish and Wildlife Foundation, and land acquisition; (2) the Department of the Interior for the Bureau of Land Management (BLM), including amounts for the National Landscape Conservation System, land acquisition, and the activities of recreation management, resource protection, and maintenance; (3) the Department of the Interior for the National Park Service, including amounts for land acquisition and state assistance; and (3) the Department of Agriculture (USDA) for the Forest Service, including amounts for land acquisition, law enforcement operations, and the activities of recreation, heritage, and wilderness.