To the east of and above Llyn Brenig at the northern edge of Clocaenog forest. Park next to a wind turbine and walk 250m down a track the barrow is just visible through the trees.
Despite the almost overwhelming forest the barrow is still about 8ft tall and it felt good to find it in such good condition, a small scoop has been taken out of the top, and the entire site is covered in several inches of spongy moss. The trees even sheltered me from the rain letting me take some photos and sit for a while. Because of the trees I can't tell whether it ever had a good view, but it sits on the edge of an eastward sloping hill so would have presumably been visible on the horizon from far off.