| Name | Image | Date | Location | County | Ownership | Description |
|---|
| Barfoot Park |  | 2011 | 31°54′54.32″N109°18′7.26″W / 31.9150889°N 109.3020167°W /31.9150889; -109.3020167 (Barfoot Park) | Cochise | Federal (Coronado National Forest) | One of the best U.S. examples of Madrean-influenced ponderosa pine forests. |
|---|
| Barringer Meteor Crater |  | 1967 | 35°1′38″N111°1′21″W / 35.02722°N 111.02250°W /35.02722; -111.02250 (Barringer Meteor Crater) | Coconino | Private | The world's first identifiedmeteor crater. |
|---|
| Canelo Hills Cienega Reserve |  | 1974 | 31°33′44.09″N110°31′33.07″W / 31.5622472°N 110.5258528°W /31.5622472; -110.5258528 (Canelo Hills) | Santa Cruz | Private (The Nature Conservancy) | Notable for the extremely rareCanelo Ladies Tresses Orchid and theGila chub. |
|---|
| Comb Ridge |  | 1976 | 36°49′08″N110°03′26″W / 36.8188°N 110.0572°W /36.8188; -110.0572 (Comb Ridge) | Navajo | Communal lands (Navajo Nation) | The only known location fortritylodont fossils in North America. |
|---|
| Grapevine Mesa | | 1967 | 35°58′28″N114°04′54″W / 35.974431°N 114.081636°W /35.974431; -114.081636 (Grapevine Mesa) | Mohave | Federal (Bureau of Land Management) | The best existing display of Joshua trees in the United States. |
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| Kaibab Squirrel Area | | 1965 | 36°24′0.6″N112°9′11.11″W / 36.400167°N 112.1530861°W /36.400167; -112.1530861 (Kaibab Squirrel Area) | Coconino | Federal (Kaibab National Forest) | Illustrative of the habitat for theKaibab squirrel. |
|---|
| Onyx Cave | | 1974 | 31°43′3″N110°46′9″W / 31.71750°N 110.76917°W /31.71750; -110.76917 (Onyx Cave) | Santa Cruz | Federal (Coronado National Forest) | Considered to be the finest cave in Arizona. |
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| Patagonia-Sonoita Creek |  | 1970 | 31°31′40.83″N110°46′31.65″W / 31.5280083°N 110.7754583°W /31.5280083; -110.7754583 (Patagonia-Sonoita Creek) | Santa Cruz | Private (The Nature Conservancy) | An example of a cottonwood-willow riparian forest and one of the last permanent stream-bottom habitat areas in southern Arizona. |
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| Ramsey Canyon |  | 1965 | 31°26′52.05″N110°18′25.88″W / 31.4477917°N 110.3071889°W /31.4477917; -110.3071889 (Ramsey Canyon) | Cochise | Private (The Nature Conservancy) | A stream-cut, vertical-sided gorge. |
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| Willcox Playa |  | 1966 | 32°8′27.6″N109°50′52.8″W / 32.141000°N 109.848000°W /32.141000; -109.848000 (Willcox Playa) | Cochise | Federal (Bureau of Land Management) | The largest "dry lake" in Arizona. |
|---|
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