Darlington
- Croft Depot Branch
- Darlington and Shildon
- Fighting Cocks Branch
- Stooperdale Curve
- Darlington and Tebay
- Brusselton Incline Branch
- Darlington to Saltburn
Middlesbrough
- Castle Eden Branch
- Hartburn East Curve
- Stockton Goods Branch
- Marsh Branch
- Marsh Branch Old Town Loop
- West Marsh Branch
- Old Town Branch
- Middlesbrough to Battersby
- North Shore Branch
- Port Clarence Branch
- Greatham Creek Branch
- Billingham Beck Branch
Redcar
- Ayton Quarries Branch
- Guisborough Branch
- Old Chaloner Branch
- Belmont Mines Branch
- Normanby Branch
- Eston Branch
- Clay Lane Ironworks Branch
- Cleveland Steelworks Branch
- Lackenby Ironworks Branch
- Redcar Deviation
- Warrenby Depots Branch
- Upleatham Mines Branch
Saltburn
- Saltburn Depot Branch
- Saltburn to Whitby
- Priestcroft Branch
- Guisborough to Brotton
- Skelton Mines Branch
- Kiltonthorpe Branch
- Lingdale Branch
- Skinningrove Zig Zag
- Liverton Mines Branch