What is recorded here

No visible result for that exact name. The available facts point to a different Derreen West place: a small subcircular cashel on a low terrace of Knockaunsmountain, with three more cashels within a hundred metres. That is a cluster of ancient field-and-rubble markers, not a named fort from the story you asked about.

On a low NW terrace of Knockaunsmountain within a large field system (CL004-098----). A subcircular enclosure (diam. c. 25m) visible on Ordnance Survey ortho photo (2005-2012). Another possible cashel (CL004-103----) lies immediately adjacent to the E. Three cashels CL004-003----, CL004-004---- and CL004-007---- lie 60-100m to NW, N and NE respectively. The following image has been uploaded: CL004-104----_01.jpg Ordnance Survey orthophoto 2005-2012. Compiled by: Mary Tunney Date of upload: 22 February 2021

A subcircular stone ringfort in Derreen West, likely dating to the early medieval period, is situated on a low terrace of Knockaunsmountain. While no specific folklore is recorded, its location within a field system suggests it may have been part of a broader agricultural or territorial landscape associated with early Irish settlements.

The monument record does not grant public access. Check the route and ask the landowner before entering private land.