The B7083 follows the pre-bypass line of the A76 through the Ayrshire town of Cumnock.
Auchinleck Main Street
The route starts at the Skerrington Roundabout on the A76 at the southern end of the bypass and heads north along Glaisnock Road. After passing an industrial estate it goes through the suburb of Netherthird, dropping slowly downhill. The houses on the left are a mixture of bungalows and cottage flats which face directly onto the road, but on the right they are set back behind trees, hedges and green spaces with a service road. The route then passes between Murray Park and a cemetery before following Glaisnock Street into the town centre. The route is soon lined with older houses on both sides as it continues to drop steadily downhill. The town centre can be seen ahead at the end of a long straight, and soon there are shops and businesses between the houses. After passing the town hall and Dumfries Arms Hotel, traffic lights control the junction with the B7046.
The town centre was redeveloped in the 2010s, so the route now continues ahead (it used to be one way southbound) and crosses the Glaisnock Water in the new town square. The next section, however, is still one way southbound, so northbound traffic either has to use the B7046, or take a lengthy detour to the right along Townhead Street. The B7083 TOTSOs left onto Lugar Street, and winds around the old parish church which stands in the old square. At the further end of Lugar Street, the A70, town centre relief road, is met at a signalised crossroads. The B7083 continues ahead onto Auchinleck Road, almost immediately crossing the Lugar Water, before winding north west through the suburb of Holmhead. Large detached houses sit on the right, with modern housing backing onto the main road on the left, accessed from a signalised crossroads. A very short distance later, another signalised junction leads to the new school campus, which lies behind the houses.
More modern housing estates lie on the edge of the town as the route heads into the area known as Knockroon. The Rigg Road comes in on the right, which climbs over the hills to Lugar on the A70. The junction sits amongst fields on a slight crest, from where the route drops down to cross the Auchinleck Burn and so enter Auchinleck itself. After passing some houses and a supermarket, the B7036 comes in from the left at traffic lights. The route then follows Main Street past a scattering of shops and businesses in what feels like a fairly run down town centre. The road goes under the Kilmarnock to Carlisle railway line in the middle of the shopping area, with the station just off to the left. Main Street then kinks left to meet the B705 at a mini-roundabout, with the B7083 continuing ahead along Mauchline Road. A long line of houses and bungalows stands on the right, with parklands and businesses interspersed on the left. It is not long, however, before the route comes to an end back on the A76 on the edge of town, at the Templeton Roundabout.
