The road measures 8.70 miles long and would take a car obeying speed limits 12 minutes to travel its length.
The B6401 is a B Road and is located in the Zone 6 Highways Region.
The road passes through several towns, including KELSO, Morebattle, Town Yetholm, and KELSO.
The road is located entirely within Roxburgh, Ettrick and Lauderdale.