Aja viide. Aja lugu.

Hertford Lock (No1) is a lock situated on the River Lea on the eastern side of Hartham Common, Hertford in the English county of Hertfordshire. It is owned and managed by Canal & River Trust and is the first lock of the River Lee Navigation.

Public access

The lock is located on the River Lee Navigation towpath which forms part of the Lea Valley Walk

Next lock upstream	River Lee Navigation	Next lock downstream
None	Hertford Lock Grid reference: TL3328013501	Ware Lock 0.5 mile

Locks and weirs on the River Lea, England
Counties	Bedfordshire Hertfordshire Essex Greater London
Locks	Hertford Lock Ware Lock Hardmead Lock Stanstead Lock Feildes Weir Lock Dobbs Weir Lock Carthagena Lock Aqueduct Lock Cheshunt Lock Waltham Common Lock Waltham Town Lock Rammey Marsh Lock Enfield Lock Ponder's End Lock Pickett's Lock Stonebridge Lock Tottenham Lock Pond Lane Flood Gates Old Ford Lock Bow Locks
Weirs	Horns Mill Weir Hertford Castle Weir Hartham Weir Ware Weir Feildes Weir Dobbs Weir Carthagena Weir Kings Weir Newmans Weir Middlesex Filter Beds Weir
Hertford Union Canal (branch from Hackney Cut)	Hertford Union Bottom Lock No. 3 Hertford Union Middle Lock No. 2 Hertford Union Top Lock No. 1 Regent's Canal
Limehouse Cut (branch, at Bow Locks)	Bromley Stop Lock Britannia Stop Lock Limehouse Basin
Bow Back Rivers (branches of the Old River Lea)	Three Mills Lock City Mill Lock Carpenter's Road Lock Marshgate Lane Lock (defunct) Three Mills Wall River Weir (These rivers form the waterways within the 2012 Olympic Park - they flow into Bow Creek)