The north of Barnoldswick is dominated by an extensive drumlin field which extends to Gargrave.
Drumlins are small hills which formed beneath the ice sheet which covered the area during the last ice age.
These hills are made from boulder clay dumped by the ice sheet as it moved over the land. The movement of the ice shaped the mounds into gently rounded, slightly egg shaped hills. The tapering of the drumlins indicates the direction the ice sheet was following.
Barnoldswick's drumlin field is a text book example of the phenomena and is visited by students of geology during field trips.
The Leeds and Liverpool Canal winds its way around the drumlins as it descends from Barnoldswick's summit stretch towards Skipton.
You can see the vast expanse of the drumlin field from the moors above Elslack.
It's perhaps best explored by following the canal towpath as it meanders around the hills.
The Pennine Way passes through the drumlins, sharing the canal tow path for a stretch.
Between Gisburn and Skipton, the A59 finds a route alongside, and sometimes over the drumlins.