| Gas Station | Regular | Plus | Premium | Diesel |
 | Loaf N Jug
731 Washington Blvd, Newcastle, WY 82701
Get Directions | $3.319 | $3.429 | $3.559 | N/A |
| Unbranded
2206 W Main St, Newcastle, WY 82701
Get Directions | $3.409 | N/A | N/A | $3.899 |
| Unbranded
1226 Washington Blvd, Newcastle, WY 82701
Get Directions | $3.419 | N/A | N/A | $3.899 |
| Unbranded
6 W Main St, Newcastle, WY 82701
Get Directions | N/A | $3.359 | $3.899 | $3.899 |
| Maverik
500 W Main St, Newcastle, WY 82701
Get Directions | $3.349 | $3.429 | $3.589 | $3.889 |
| Unbranded
149 6th Ave, Edgemont, SD 57735
Get Directions | $3.399 | $3.199 | $3.499
Lowest Price | $3.799 |
 | Conoco
Us-18 & Sr-471, Edgemont, SD 57735
Get Directions | $3.549 | N/A | N/A | $3.909 |
 | Sinclair
1002 2nd St, Upton, WY 82730
Get Directions | $3.339 | N/A | N/A | $3.829 |
| Unbranded
222 W Hwy 16, Upton, WY 82730
Get Directions | $3.239 | N/A | N/A | N/A |
| Conoco
700 Main St, Hill City, SD 57745
Get Directions | $3.299 | N/A | N/A | $3.899 |
 | Cenex
23820 Highway 385, Hill City, SD 57745
Get Directions | $4.359 | $3.389 | N/A | N/A |
 | Exxon
201 Main St & Deerfield, Hill City, SD 57745
Get Directions | $3.299 | N/A | N/A | N/A |
| Conoco
2723 East Cleveland Street, Sundance, WY 82729
Get Directions | $3.499 | $3.439 | $3.739 | $3.909 |
| Unbranded
522 Cleveland St, Sundance, WY 82729
Get Directions | $3.299 | $3.399 | N/A | $3.799 |
| Conoco
20059 W Highway 14, Sundance, WY 82729
Get Directions | $3.299 | $3.499 | $3.699 | $3.979 |
| Sinclair
504 Cleveland St, Sundance, WY 82729
Get Directions | $3.299 | $3.429 | N/A | $3.819 |
| Common Cents
24 W Mount Rushmore Rd, Custer, SD 57730
Get Directions | $3.179
Lowest Price | N/A | N/A | N/A |
| Unbranded
239 N 5th St, Custer, SD 57730
Get Directions | $3.299 | N/A | N/A | N/A |
| Big D Oil
381 Highway 16 W, Custer, SD 57730
Get Directions | $3.179 | $3.279 | N/A | $3.679
Lowest Price |
| Unbranded
49 N 5th St, Custer, SD 57730
Get Directions | $3.299 | $3.179
Lowest Price | N/A | $3.739 |