Created in 2016 by President Obama and named for two buttes that jut above the ridgeline, Bears Ears originally encompassed 1.35 million acres in southern Utah’s red rock country and protected cliff dwellings and one of the West’s largest collections of tribal artifacts. UPDATE: On December 4th, 2017, President Trump singned a proclamation to split Bears Ears into two monuments. The resulting monuments have a combined area of 201,876 acres, which is a reduction of 85%.

Created in 1996 by President Clinton , this series of cliffs and plateaus descends in multi-colored stair-steps over 1.7 million acres reaching from Bryce Canyon in southwest Utah to the Grand Canyon. The monument also protects paleontological and tribal archeological sites, as well as 300 animal species. UPDATE: On December 4th, 2017, President Trump signed a proclamation to split Grand Staircase Escalante into three monuments. The resulting monuments have a combined area of 1,003,863 acres, which is a reduction of 46%.

National Monuments reviewed but unchanged:

Hanford Reach, California

Created in 2000 by President Clinton in eastern Washington, the monument once served as a 194,000-acre buffer zone around the Hanford Nuclear Reservation in eastern Washington state. It protects one of the last large shrub-steppe ecosystems in the Columbia River Basin.

Upper Missouri River Breaks, Montana

Created in 2017 by President Clinton, the monument encompasses 377,000 acres along a 149-mile stretch of the Missouri River in central Montana and includes parts of the Lewis and Clark Historic Trail that remain as wild as they were in 1805.

Craters of the Moon, Idaho

Created in 1924 by President Coolidge, enlarged slightly by President Kennedy in 1962 and then expansively by President Clinton in 2000. Idaho lawmakers have proposed that Congress designate the original 54,000 acres of this 738,000-acre moonscape of lava beds and cinder cones as Idaho’s only national park.

Cascade Siskiyou, Oregon/California

Created in 2000 by President Clinton, the 100,000-acre monument straddles the Oregon-California border region of the Cascade Range and protects habitat for a diverse array of species, including the threatened spotted owl, the pileated woodpecker and the pygmy nuthatch.

Berryessa Snow Mountain, California

Created by President Obama in 2015 in northern California, this 331,000-acre monument reaches from Pacific Ocean beaches to the 7,000-foot mountains of the Inner Coastal Range. It protects ancient Native American settlement sites and provides winter habitat for bald eagles.

Giant Sequoia, California

Created in 2000 by President Clinton in central California, this 328,000-acre expanse is split between two sections directly north and south of Sequoia National Park, and protects 33 groves of the world’s largest tree.

Carrizo Plain, California

Created in 2001 by President Clinton, this 204,000-acre vista is one of the last intact parts of the grassy plain that covered California’s Central Valley two centuries before settlers arrived. The monument features abundant springtime wildflowers and one of Southern California’s largest wetlands.

San Gabriel Mountains, California

Created in 2014 by President Obama in the mountain forests of Southern California, this 346,000-acre “island of green” provides 70 percent of the open space and 30 percent of the drinking water for 15 million people in the Los Angeles Basin.

Sand To Snow, California

Created in 2016 by President Obama, the 87,500-acre monument added 54,000 acres to a 100,000-acre wilderness area in Southern California already protected by Congress. This desert-to-mountain terrain is home to more than 240 species of birds and 12 threatened or endangered animals.

Mojave Trails, California

Created in 2016 by President Obama, this undeveloped stretch of famed Route 66 in Southern California expands a 350,000-acre wilderness area set up by Congress into a 1.6-million-acre expanse of dramatic sand dunes and ancient lava flows.

Basin and Range, Nevada

Created in 2015 by President Obama in southeastern Nevada, the monument extends over 704,000 acres of some of the most rugged terrain in the Great Basin Desert and protects prehistoric rock art dating back 4,000 years.

Gold Butte, Nevada

Created in 2016 by President Obama, this 296,940-acre landscape of red sandstone formations fills in the gap between the Lake Mead National Recreation Area and the Virgin Mountains, creating a continuous wildlife corridor for large animals, including bighorn sheep and mountain lions.

Grand Canyon-Parashant, Arizona

Created by in 2000 by President Clinton, the monument spans just over 1 million acres of roadless, undeveloped and remote land along the north rim of the Grand Canyon in Arizona. It protects dramatic geologic formations of cliffs and buttes that feature fossils and tribal artifacts dating to the ice age.

Vermilion Cliffs, Arizona

Created in 2000 by President Clinton, this 293,000-acre geologic treasure of trails leading through spectacularly colored rock strata lies northeast of the Grand Canyon in Arizona. Endangered California condor hatchlings bred in captivity are released here to live.

Sonoran Desert, Arizona

Created by President Clinton in 2001 in southern Arizona, the monument extends over 487,000 acres of mountains and thick forests of saguaro cactus in North America’s most biologically diverse desert. It also protects archaeological sites and remnants of historic trails.

Ironwood Forest, Arizona

Created in 2000 by President Clinton, this 129,000-acre vista lies in the Silver Bell Mountains in southern Arizona. It protects one of the densest forests of ironwood trees, which can live for 800 years.

Canyons of the Ancients, Colorado

Created in 2000 by President Clinton, the monument spans 175,160 acres in southwest Colorado. It protects archaeological sites dating back 10,000 years, and is home to many desert species including peregrine falcons, red-tailed hawks and golden eagles.

Río Grande del Norte, New Mexico

Created in 2013 by President Obama in northern New Mexico, this high desert landscape reaches across 242,500 acres of the Río Grande River Gorge and features deep canyons and volcanic cones. The monument protects numerous collections of tribal artifacts and serves as a major migratory flyway for sandhill cranes, herons, avocets, hummingbirds, and Canada geese.

Organ Mountains Desert Peaks, New Mex.

Created in 2014 by President Obama, this monument includes 496,000 acres across southern New Mexico with a rich history dating to the Folsom and Clovis cultures and six wilderness study areas under protection since 1980.

Katahdin Woods and Waters, Maine

Created in 2016 by President Obama in the wilds of north central Maine, this 87,500-acre collection of streams, rivers, forests and trails lies within a larger landscape that public and private efforts have worked for a century to protect.

Marianas Trench

Created in 2009 by President Obama in the western Pacific Ocean, the monument reaches for 95,216 square miles across a string of 14 volcanic islands known as the Mariana Archipelago. It supports a richly diverse array of sea life and formations, including the largest mud volcanoes on Earth.

Papahānaumokuākea

Created by President Bush in 2006 and enlarged by President Obama in 2016 in the Pacific Ocean, this 583,000 square-mile expanse is the world’s largest protected area. One fourth of the 7,000 species of marine animals and seabirds that live in the monument are not found anywhere else.

Pacific Remote Islands

Created by President Bush in 2009 and enlarged by President Obama in 2014, the Pacific Ocean 490,000-square-mile monument is the world’s largest marine conservation area and one of the last refuges protecting many animals and fish, including turtles, sharks, dolphins, whales, parrotfish, large grouper, and pearl oysters.

Rose Atoll

Rose Atoll Marine Created in 2009 by President Bush, this South Pacific Ocean monument protects 13,400 square miles of rare and endangered marine animals and seabirds, including giant clams, parrotfishes, sharks, whales the largest Eer of nesting turtles in American Samoa—as well as the Rose Atoll Wildlife Refuge, created in 1973 to protect the rose-colored corals for which it was named.

Northeast Canyons and Seamounts