Trent Lock (otherwise Trentlock) is located south of Long Eaton, on the borders of Derbyshire, Leicestershire and Nottinghamshire in the United Kingdom.
Immediately to its north-east is Trent Junction, a similarly important five-way meeting point in the national railway system.
On a local scale this means that Derbyshire is to the north of the point, whilst Nottinghamshire is to the south-east and Leicestershire is to the south-west, which is somewhat different from the global arrangement.
Near this point two canals also meet the Trent - the Erewash Canal, coming south-east from Long Eaton, and the short Cranfleet Cut provides a route for boats heading downstream on the Trent, avoiding a weir.
The Midland Main Line also runs past the area, over the Trent and the Cranfleet Cut.