| Route | Cylla Branch |
| Section | Ystrad Mynach North Jn to Penrhiwfelin |
| Remarks | Understood to be disused |
| ELR Maps | Atlas , Interactive |
| Area Maps | Ystrad Mynach |
| Extent | 13M 0797y to 15M 1223y • 2.242 miles • 3.608 km |
| Measured | 1.130 km (Δ -2478m) ⚠️ Very large variation between reported and measured extents |
| Neighbours | CAR , PTA |
| NR Region | Wales & Western |
 | TRACKmaps Book 3 — Western & Wales |
🏢 Administrative Area
| Mileage | Country | Administrative Area |
|---|---|---|
| 13M 0797y to 15M 1223y | Wales | Caerphilly |
📍 Nearest Place and District
| Mileage | Nearest Place | District / County | Distance |
|---|---|---|---|
| 13M 0797y to 14M 0736y | Tredomen | Caerphilly | 132m - 408m |
| 14M 0737y to 14M 1440y | Ystrad Mynach | Caerphilly | 412m - 570m |
| 14M 1441y to 15M 1223y | Hengoed | Caerphilly | 375m - 569m |
🏷️ Positional Accuracy Statistics
| Property | Count | Min | Max | Mean | Median | Std Dev |
|---|---|---|---|---|---|---|
| Linear Accuracy | 3 | -1329m | -491m | -826m | -658m | 443m |
| Normalised Quarter Miles | 3 | 138y | 138y | 138y | 138y | 0y |
| Calibration Segment Length | 3 | 782y | 2116y | 1315y | 1048y | 706y |