Pretty much, yes. A fell is a high, flat and often barren landscape feature such as a mountain range or moor-covered hill. It's often employed in Northern England and Scotland, but also on the Isle of Man and as far away as Fennoscandia (perhaps where it originated?).
The Northern Fells in the Lake District are a good example, occupying a circular area of about 10 miles in diameter that range from low hills to the highest ground in England. The area is surrounded by roads but none of them traverse it, making it somewhat of a walker's paradise.
Regards
Pod