|Distance:||6.2 miles (10 km)|
|Meets:||A56, B6383, B6252, A59|
|Route outline (key)|
The B6251 is a largely rural B-road in Pendle Forest.
The road starts on the A56 in Foulridge and heads west, zigzagging through the village streets to reach open country. It crosses a bridge over the long-gone Colne to Skipton railway line before climbing the steep Cocker Hill. Halfway up the hill the road narrows and remains S1 even after levelling out.
The B6251 then bends sharply to the right before widening again and running alongside Whitemoor Reservoir, although the water cannot actually be seen. Before reaching the end of the reservoir the road crosses the County Brook, the historic boundary between Lancashire and Yorkshire.
The road continues north along High Lane and later Higher Lane, contouring round the edge of White Moor, and then descends into Barnoldswick. In the town centre it reaches a T-junction where it TOTSOs left; the road to the right is the B6383. Shortly afterwards the B6252 turns right at a mini-roundabout.
We continues north out of town along Gisburn Road. The road zigzags to the west to avoid crossing the Stock Beck but goes through the village of Bracewell instead. Eventually the road ends at a T-junction on the A59 to the south of Horton.