Continuing north from Towford it's tarmac for just over 1km to Pennymuir. I've never yet walked or cycled the next 3km to the Five Stanes stone circle, but here is a pic of the five stanes looking south -
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The roman 'road' is slightly darker green grass this side of the dry stane dyke on the right of the picture. From this point northward it's a slightly better defined grassy path for about 1km -
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then becomes more of a track in between two dykes until you reach tarmac at Whitton Edge, where the road turns sharply west and from where the photo in my previous post was taken. From there it's a 3km downhill tarmac roller coaster which even has a blind dip - it has overhanging trees on both sides which as you descend hide the view of the up side of the dip - the road is straight, but only single track, though it is very quiet. At Shotheids the tarmac ends. I've never walked the next 3km to Cappuck. IIRC there is a footbridge at Cappuck over the Oxnam Water.
This is a photo from Ulston Moor looking south towards Cappuck -
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The surface is like that all the way from Cappuck to Jedfoot.
From Jedfoot the road is 'lost' for 2km so follow the St Cuthbert's way footpath which crosses the Teviot on a suspension bridge. The next 5km to Hiltonshill Toll is a footpath which meanders back and forth along the line of the old road. This is looking north towards Lilliardsedge (monument on the horizon) with Eildon Hill North visible to its left.
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And looking south from Lilliardsedge -
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At Hiltonshill Toll the road becomes the A68 for about 2km to where the A68 turns right to pass through St Boswells. The line of Dere Street from there to Trimontium is lost.