[Bibio]

your best route is going up the A7 from Carlisle then Selkirk, Peebles, Carnwath then a sneaky route to the bridge up past knockhill, Creiff, Lochearnhead.

or M74 to Abington, Biggar, Carnwath, a sneaky route and then as above.

if you have Tyre installed i can give you the sneaky route.

both routes cut out all the heavy traffic.