A fearsat, or strand pass, is a manmade route across a body of water easily passable at low tide. They were constructed by overlaying branches, bushes, stones, seaweed, and wood to create a raised causeway. From ancient times, and up to the 19th century, there were several such routes across Drumcliffe Estuary facilitating north-south travel in earlier times when land routes were at times less accessible.
Fearsat were often used by armies on the march seeking the shortest route between locations and for this reason history records that battles, such at the Battle of the Books, often occurred in their vicinity. Today, there are no visual remains of Drumcliffe’s fearsat other than the laneways at Dooneirin and Coolbeg leading to the estuary shoreline.