| Number | County | Name | Owner | Verif | GPS | Description |
| MT-33-01 | Musselshell | Northumberland Star | Jim Crawford | 07-2013 | N46 28.037 W108 27.552 | NNE of Roundup. US12 E. 4.2 miles from jct with US87 (Main St.) in Roundup to the quilt on the N. side of the road at 17357. |