Lock is small crossroads town in the central Eyre Peninsula that services a large grain production region. When heading north from Port Lincoln and Cummins, the highway will then take the traveler through to the township of Lock.
The town was gazetted in February 1918, and named Lock after Corporal Albert Lock, a member of the South Australian Survey Department who had been killed in Belgium during World War I, in 1917. Interestingly there is no visual or memorial reference to this historic fact.
A major change occurred in the area with the arrival of the Port Lincoln railway line in 1913. The area was serviced by a siding known simply as Terre Siding after one of the local properties.
The potential for wheat cropping was realized with the establishment of the railway, but the low rainfall kept any developments from happening until the pipeline from the Tod Reservoir was connected. Two years later, a huge underground water reservoir was discovered under the town, capable of supplying all of the town's water needs.
Although Lock is an interesting small town, unless the traveler is traveling this highway a diversion is not recommended or necessary.