Birks Fell is a hill in the Yorkshire Dales, near to Hubberholme in North Yorkshire, England. It is classed as a Marilyn (a hill with topographic prominence of at least 150m). Birks Fell only became an official Marilyn in 2006 as it was resurveyed and discovered to be and not as previously thought. Books from the late 19th and early 20th centuries list the hill as being and it is thought that in the conversion to metric, the hill lost some height. This raises it above neighbouring Horse Head Moor (609 m), making it the Marilyn in place of Horse Head Moor.