| Ruins |
| Alabama | Florida | Louisiana | Nebraska | Oklahoma | Vermont |
| Alaska | Georgia | Maine | Nevada | Oregon | Virginia |
| Arizona | Hawaii | Maryland | New Hampshire | Pennsylvania | Washington |
| Arkansas | Idaho | Massachusetts | New Jersey | Rhode Island | West Virginia |
| California | Illinois | Michigan | New Mexico | South Carolina | Wisconsin |
| Colorado | Indiana | Minnesota | New York | South Dakota | Wyoming |
| Connecticut | Iowa | Mississippi | North Carolina | Tennessee | |
| District of Columbia | Kansas | Missouri | North Dakota | Texas | |
| Delaware | Kentucky | Montana | Ohio | Utah |
| Montana |
| Feature Name | County | Class | Latitude | Longitude | 1:24,000 USGS Topographic Map |
Elevation in Feet |
Feature ID# |
| Fort Smith Ruins | Big Horn | Locale | 451852N | 1075432W | Yellowtail Dam | 3264 | 771519 |
| Ruins of Fort Maginnis | Fergus | Locale | 471058N | 1090805W | Judith Peak | 4295 | 776011 |