If you only have time for one stretch of Hadrian's Wall, make it the central section between Haltwhistle and Housesteads. Here the Wall runs along the top of the Whin Sill, a long ridge of hard volcanic rock that forms a natural cliff facing north, and the stone curtain rides the crests like a rollercoaster, dipping into gaps and climbing again. Built from AD 122 on the orders of the Emperor Hadrian, it stretched about seventy-three miles from coast to coast, with milecastles, turrets and forts along its length. The UNESCO listing covers it as part of the Frontiers of the Roman Empire.
Near Haltwhistle, Cawfields has a well-preserved milecastle and a stretch of wall climbing up the crags, beside a small lake in an old quarry. Walltown Crags, a little west, has one of the highest surviving sections of wall, and the Roman Army Museum stands nearby. To the east, Great Chesters fort, Steel Rigg and the crags around Crag Lough lead towards Housesteads, the best-preserved fort on the Wall. The famous sycamore tree that stood in a dip near Steel Rigg was illegally felled in 2023, causing national outrage; the gap where it stood is still a place of pilgrimage.
Haltwhistle calls itself the centre of Britain, and the claim is at least as good as anyone else's. It is a small market town in the South Tyne valley, with fuel, a few cafés, shops and pubs, and it makes a practical base for exploring the Wall.
The Military Road, the B6318, runs just south of the Wall through this section, rising and falling over the open moorland with long straights, sudden crests and dips that hide oncoming cars. It is wonderful to ride, with views over the wild landscape of Northumberland, but treat the blind summits with respect and watch for sheep, walkers and tourists parking on the verge. North of the Wall, the land opens into the empty moorlands and forests of Kielder, with quiet roads and a vast reservoir.
The weather can be brutal, with strong winds, horizontal rain and low cloud even in summer. On a clear day, though, the views are endless, and the light on the crags in the evening is golden. Haltwhistle is where to refuel, rider and bike alike.