|Location Map ( geo)|
|To:||Market Rasen (TF109890)|
|Distance:||17.1 miles (27.5 km)|
|Meets:||A1243, B1219, A18, B1225, A631, B1202|
|Route outline (key)|
The B1203 leads from the suburbs of Grimsby across the Lincolnshire Wolds to Market Rasen via Binbrook and its airfield.
It starts in Scartho, on the southern edge of Grimsby, on the A1243 (former A16). It heads south to meet the western end of the B1219 in Waltham before continuing southwestwards. The A18 is crossed at a roundabout between Brigsley and East Ravendale before the road zigzags through Binbrook.
The B1203 crosses the Viking Way long distance footpath in Tealby before crossing Risby Moor to end on the A631 in Market Rasen.
The route of the B1203 is unchanged since classification in 1922.