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Triangulation Pillar S6623: Military Road 
Location
Grid reference: NY 97315 68989.
Landranger 87: Hexham & Haltwhistle.
Waypoint: TP4822.
Neighbouring Triangulation Pillars
| S6654 | Five Lane Ends 5.61km to the north. |
| S6500 | Dilston 6.90km to the south. |
| S6662 | Warden Hill 6.94km to the west. |
| S3995 | Moot Law 7.92km to the northeast. |
| S6579 | Hexham Racecourse 8.60km to the southwest. |
Third Geodetic Levelling, England & Wales (1950-68)
This triangulation pillar was used during the Third geodetic levelling, England & Wales. It was included on the Hexham to Hawick levelling line.