Hawthornthwaite Fell is one of the larger hills in the Forest of Bowland in Lancashire, England, occupying a north-facing position on the south-western range, close to Bleasdale and Fair Snape Fell. The only path to the summit comes over the hills from the south. Most of the hill is on the Duke of Westminster's land. The summit is boggy and flanked to the north by steep heather slopes. Grouse are farmed in the area and hen harriers can be seen frequently.