The route, assuming it's the one we've done before, has two main climbs - Lanercost to Banks and Greenhead. Those are on Hadrian's Cycleway.
After that we rode along the undulating military road to a little after the national park visitor centre then a descent to Hexham. In the middle of the night, the military road is very quiet, during the day, not so much.
Hadrian's Cycleway doesn't go on the military road but drops into Haltwhistle after Greenhead followed by a climb to Vindolanda before meeting up with our route into Hexham. After that it's fairly flat apart from a drag coming out of Corbridge.