The road measures 35.38 miles long and would take a car obeying speed limits 57 minutes to travel its length.
The A81 is a A Road and is located in the Zone 8 Highways Region.
This is a true long-distance route, journeying through numerous towns like CALLANDER, Port Of Menteith, Aberfoyle, Gartmore, Balfron Station, Balfron, Killearn, Strathblane, Dumgoyne, Blanefield, Milngavie, Bearsden, and GLASGOW.
The road passes through several counties, including Stirling and Falkirk, Dunbartonshire, and City of Glasgow.