|   | 
 Name | 
 Image | 
 Date | 
 Location | 
 County | 
 Ownership  | 
 Description | 
 
|  1  | 
 Big Southern Butte   | 
   | 
 000000001976-01-01-00001976 | 
 Atomic City43°24′05″N 113°01′26″W / 43.401389°N 113.023889°W / 43.401389; -113.023889 (Big Southern Butte) | 
 Butte  | 
 federal (Bureau of Land Management)  | 
 A 2,500 ft Rhyolitic dome that rises over the Eastern Snake River Plain.  It illustrates the scope and dimensions of Quaternary volcanism in the western United States. | 
|  2  | 
 Big Springs   | 
   | 
 000000001980-01-01-00001980 | 
Island Park44°30′01″N 111°15′19″W / 44.500278°N 111.255278°W / 44.500278; -111.255278 (Big Springs) | 
 Fremont  | 
 federal (Caribou-Targhee National Forest)  | 
 The only first-magnitude spring in the country that issues forth from rhyolitic lava flows. | 
|  3  | 
 Cassia Silent City of Rocks   | 
   | 
 000000001974-01-01-00001974 | 
Malta42°04′34″N 113°42′06″W / 42.076026°N 113.701676°W / 42.076026; -113.701676 (City of Rocks) | 
 Cassia  | 
 federal (City of Rocks National Reserve)  | 
 Monolithic landforms created by exfoliation processes on exposed massive granite plutons. | 
|  4  | 
 Crater Rings   | 
   | 
 000000001980-01-01-00001980 | 
Mountain Home43°11′27″N 115°51′35″W / 43.1907°N 115.8597°W / 43.1907; -115.8597 (Crater Rings) | 
 Elmore  | 
 federal (Morley Nelson Snake River Birds of Prey National Conservation Area) | 
 Two adjacent and symmetrical pit craters that are among the few examples of this type of crater in the continental United States. | 
|  5  | 
 Great Rift of Idaho   | 
   | 
 000000001968-01-01-00001968 | 
Craters of the Moon National Monument and Preserve43°27′42″N 113°33′46″W / 43.46167°N 113.56278°W / 43.46167; -113.56278 (Great Rift) | 
 Blaine, Minidoka, Power   | 
 federal (Craters of the Moon National Monument and Preserve) | 
 A tensional fracture in the Earth's crust. | 
|  6  | 
 Hagerman Fauna Sites   | 
   | 
 000000001975-01-01-00001975 | 
 Hagerman Fossil Beds National Monument42°47′26″N 114°56′41″W / 42.7906°N 114.9448°W / 42.7906; -114.9448 (Hagerman Fossil Beds) | 
 Twin Falls  | 
 federal (Hagerman Fossil Beds National Monument)  | 
 Contains the world's richest deposits of Upper Pliocene age terrestrial fossils. | 
|  7  | 
 Hell's Half Acre Lava Field   | 
   | 
 000000001976-01-01-00001976 | 
 Blackfoot43°30′N 112°27′W / 43.5°N 112.45°W / 43.5; -112.45 (Hell's Half Acre Lava Field) | 
 Bingham,  Bonneville   | 
 federal (Bureau of Land Management)  | 
 Fully exposed pahoehoe lava flow. | 
|  8  | 
 Hobo Cedar Grove Botanical Area   | 
   | 
 000000001980-01-01-00001980 | 
 Shoshone47°05′28″N 116°07′37″W / 47.0911°N 116.127°W / 47.0911; -116.127 (Hobo Grove) | 
 Shoshone  | 
 federal (St. Joe National Forest)  | 
 An outstanding example of pristine western red cedar forest. | 
|  9  | 
 Menan Buttes   | 
   | 
 000000001980-01-01-00001980 | 
 Menan43°36′N 111°30′W / 43.6°N 111.5°W / 43.6; -111.5 (Menan Buttes) | 
 Jefferson, Madison  | 
 federal (Bureau of Land Management)  | 
 Contains outstanding examples of glass tuff cones, which are found in only a few places in the world. | 
|  10  | 
 Niagara Springs   | 
   | 
 000000001980-01-01-00001980 | 
 Hagerman42°51′28″N 114°52′35″W / 42.85778°N 114.87639°W / 42.85778; -114.87639 (Niagara Springs) | 
 Gooding  | 
 private | 
 Least developed of the large springs discharging into the Snake River from the Snake River plain aquifer system. | 
|  11  | 
 Sheep Rock   | 
   | 
 000000001976-01-01-00001976 | 
 Council45°11′30″N 116°40′17″W / 45.191651°N 116.67132°W / 45.191651; -116.67132 (Sheep Rock) | 
 Adams  | 
 federal (Payette National Forest)  | 
 Horizontally layered lavas that represent successive flows on the Columbia River Basalt Plateau. |