There is not much to see at Bean Burn, and that is rather the point. East of Haltwhistle, in the South Tyne valley a little below the line of Hadrian's Wall, archaeologists have traced the outline of a Roman temporary camp: a rectangle of low banks and ditches, often barely visible except from the air or in raking evening light. Camps like this were thrown up by soldiers on the march or during construction of the Wall, a night's or a season's shelter surrounded by a turf rampart and a ditch, with leather tents pitched inside in neat rows. Northumberland has an unusual concentration of them, and they tell a quieter story than the forts: of thousands of men moving across this landscape, digging in, moving on.
The country around Haltwhistle is where the Wall frontier becomes truly wild. Just to the north rise the dolerite crags of the Whin Sill, the long volcanic ridge the Romans used as a natural rampart, and beyond them open moorland stretches away toward the Kielder forests and the border. The burns run brown with peat, curlews call in spring, and the light changes by the minute as cloud shadows sweep across the fells. In winter it can feel properly remote, and fog or driving rain arrive with little warning.
For riding, the Military Road, the B6318, is just to the north and is the main attraction: a rolling, switchback line along the Wall with dips, crests and long views over the crags. Off it, narrow lanes lead north onto the moors or south down into the South Tyne valley, often single-track with passing places, cattle grids, sheep on the road and the occasional gravel patch. Take your time, assume something is coming round every blind bend, and remember that the farmers here have right of way in practice if not in law. Summer weekends bring tourist traffic and cyclists; early mornings and autumn evenings are glorious.
Haltwhistle, which likes to call itself the centre of Britain, is about five kilometres away and has fuel, a few cafés, pubs and small shops, making it the natural base for this stretch. Hexham, a larger market town to the east, offers more choice. Bring a flask and a bit of imagination to the camp site, find the banks if you can, and picture a cohort of legionaries shivering under canvas in the northern wind.