Fossil palm frond from Fossil Butte National Monument

• Agate Fossil Beds National Monument Nebraska (Mammals such as North American rhinoceroses and bison-sized "hell pigs") 

• Badlands National Park South Dakota (Ancient horses, rhinos and saber-toothed cats)

• Channel Islands National Park California (Pygmy mammoths) 

• Death Valley National Park California 

• Denali National Park & Preserve Alaska (Dinosaur tracks, dung and skin impressions)

• Dinosaur National Monument Utah & Colorado (Dinosaurs such as Stegosaurus, Apatosaurus, and Allosaurus)

• Florissant Fossil Beds National Monument Colorado (Petrified wood and insect and leaf impressions)

• Fossil Butte National Monument Wyoming (Some of the world's best preserved fossils of ancient fish, reptiles, birds, mammals, insects and plants; articulated skeletons)

• Glen Canyon National Recreation Area Utah (Plesiosaurs and dinosaur tracks)

• Grand Canyon National Park Arizona (Trilobites, crinoids, brachiopods, plants, tracks, etc.)

• Guadalupe Mountains National Park Texas (Capitan Reef!)

• Hagerman Fossil Beds National Monument Idaho (The Hagerman Horse, Equus simpicidens, the first true horse)

• John Day Fossil Beds National Monument Oregon (Saber/spike-toothed salmon, ancient horses, brontotheres, "hell pigs", oreodonts, bear-dogs)

• Lake Mead National Recreation Area Arizona & Nevada (Coral Reefs and petrified wood)

• Petrified Forest National Park Arizona (Petrified wood and archosaurs)

• Tule Springs Fossil Beds National Monument Nevada (Mammoths, saber-toothed cats, and ancient camels)

• Waco Mammoth National Monument Texas (Only recorded nursery herd of Columbian mammoths)

• Yellowstone National Park Wyoming (various invertebrates, vertebrates and fossil plants)