This article is about the Class III road numbered C42 maintained by Orkney Islands Council. For other roads numbered C42, see C42.
The C42 follows Great Western Road north from Pickaquoy Road in Kirkwall. This is a commercial part of town, with offices, small industrial units, police and fire stations as well as the bus station along the road. Between the Bus Station and Fire Station, Great Western Road keeps ahead, whilst the main road swings left onto Burgh Road which leads to the A965. It is presumed, although not certain, that this is the C42.