| Section of Line | Opened | Closed | Notes |
|---|---|---|---|
| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | |
|---|---|---|---|---|---|---|
| 1 | ↕ | Moat Lane East | - | |||
| Moat Lane Junction | ||||||
| Llandinam | ||||||
| Dolwen | ||||||
| 2 | ↕ | Llanidloes | 7m 924yds | CL 27 DRS 32 URS 50 |
||
| Tylwch | ||||||
| Glan-yr-Afon Halt | ||||||
| 3 | ↕ | Pantydwr | 7m 506yds | DCL 23 UCL 24 |
||
| St. Harmons Halt | ||||||
| Marteg Halt | ||||||
| 4 | ↕ | Rhayader | 6m 1276yds | DCL 20 UCL 18 URS 23 |
||
| 5 | ↕ | Doldowlod | 3m 506yds | DCL 20 UCL 21 |
||
| 6 | ↕ | Newbridge-on-Wye | 4m 88yds | DCL 14 UCL 13 |
||
| 7 | ↕ | Builth Road | 4m 22yds | DCL 53 UCL 38 DRS 14 URS 24 |
||
| 8 | ↕ | Builth Wells | 1m 858yds | DCL 55 UCL 60 |
||
| Llanfaredd Halt | ||||||
| Aberedw Halt | ||||||
| Tircelyn Platform | ||||||
| 9 | ↕ | Erwood | 6m 1474yds | DCL 24 UCL 27 DRS 15 |
||
| Llanstephan Halt | ||||||
| 10 | ↕ | Boughrood and Llyswen | 4m 396yds | DCL 27 UCL 24 URS 15 |
||