| AMTRAK | Transport service connecting all US states except Alaska, Hawaii, South Dakota and Wyoming |
| BLACKHILLS | Famed small mountains of South Dakota and Wyoming? (5,5) |
| VERMONT | Maine, Alaska, Hawaii and which other state prohibit all billboards next to roads? (7) |
| LOWER | ___ 48 (the U.S. except Alaska and Hawaii) |
| EMU | Bird that lives in all Australian states except Tasmania |
| DINGO | What is the Australian wild dog found in all states except Tasmania? (5) |
| ISOBAR | What is the line drawn on a weather map connecting all points with the same barometric pressure? (6) |
| SEATBELTS | They're legally required for adults in every state except New Hampshire |
| CLICK | "___ it or ticket" (slogan applicable to every state except New Hampshire) |
| MEISSNEREFFECT | The phenomenon in which magnetic flux is excluded from a substance when it is in a superconducting state, except for a thin layer at the surface |
| CADDO | A group of Plains Indians formerly living in what is now North and South Dakota and Nebraska and Kansas and Arkansas and Louisiana and Oklahoma and Texas. |
| RUSHMORE | Mount ---, a mountain in South Dakota and a US national memorial (8) |
| ESCAPED | Fugitive at last got cover in South Dakota and got away (7) |
| BADLANDS | Deeply eroded barren area of South Dakota and Nebraska (3,5) |
| PIERRESTON | South Dakota and Virginia cities merge? |
| IOWA | State that borders South Dakota and Nebraska |
| PIERREADING | South Dakota and Pennsylvania cities merge? |
| NEB | State between South Dakota and Kansas: Abbr. |
| EUROSTAR | High-speed rail service connecting London and Paris (8) |
| RODEO | Official state sport of South Dakota, Texas, and Wyoming |
