|To:||Burton Bank (SE350075)|
|Distance:||2.1 miles (3.4 km)|
|Met:||A635, A628, A61|
|Now part of:||A633|
|Route outline (key)|
The B6377 was a short-lived B road forming an unofficial bypass of Barnsley. It was unclassified in 1922 but came into being soon afterwards. However, in the late 1920s, some of it became a northern extension of the A633 which it remains. The remainder is now unclassified.
Starting on the A635 Doncaster Road the road headed north along Grange Lane before crossing the A628 and continuing northwest along Rotherham Road. It then bore left into Burton Road to end on the A61 Wakefield Road.