| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| 1 |
 | - | ↓ | Craven Arms Junction | - | ||
| 2 | ↑ | ↓ | Broome Station | 2m 1130yds | |||
| 3 | ↑ | ↓ | Hopton Heath Station | 2m 1000yds | |||
| 4 | ↑ | ↓ | Bucknell Station | 2m 1460yds | URS 31 | ||
| 5 | ↑ | ↕ | Knighton Station No. 1 | 4m 22yds | URS 57* DRS 59* |
* One siding | |
| 6 | ↕ | Knighton Station No. 2 | 0m 462yds | ||||
| Knucklas Halt | |||||||
| 7 | ↕ | Llangunllo Station | 6m 794yds | CL 43 URS 46 |
|||
| 8 | ↕ | ↓ | Llanbister Road Station | 2m 1608yds | |||
| 9 | ↑ | ↓ | Dolau Station | 3m 1148yds | |||
| 10 | ↑ | ↕ | Penybont Junction | 2m 745yds | |||
| 11 | ↕ | Penybont Station | 0m 1015yds | ||||
| 12 | ↕ | Llandrindod Wells | 3m 255yds | URS 60 U and DRS 60 |
|||
| 13 | ↕ | Howey | 3m 408yds | UCL 47 | |||
| 14 | ↕ | ↓ | Builth Road H.L. No. 1 | 2m 1254yds | |||
| ↑ | ↕ | Builth Road H.L. Station | |||||
| 15 | ↕ | Builth Road H.L. No. 2 | 0m 616yds | ||||
| Cilmery Halt | |||||||
| 16 | ↕ | Garth Station | 5m 326yds | UCL 40 DCL 40 |
|||
| Llangammarch Wells Stn. | |||||||
| 17 | ↕ | Llangammarch Wells Stn. | 5m 66yds | UCL 40 DCL 40 |
|||
| 18 | ↕ | Sugar Loaf Summit | 2m 1539yds | UCL 37 DCL 40 |
|||
| 19 | ↕ | Cynghordy Station | 3m 1430yds | UCL 54 DCL 54 |
|||
| 20 |
 | ↕ | Llandovery No. 1 | 4m 1220yds | DRS 31 | ||