Situated on a promontory created by the intersection of some tributaries (namely the Littledean, Ploughlands and Broomhouse Burns) with the River Tweed, this fort is cut off from the surrounding land by irregularly spaced ditches.

With the field now under cultivation, little is visible on the ground. However resistivity results identified at least three ditches, while magnetometry results identified at least five enclosing ditches.

The fort was later reused as a castle site, with Littledean Tower having been built there in the 16th century (and probably a predecessor at an earlier date).