Sgwd Einion Gam — whose name translates roughly as "fall of the crooked Einion" — drops 70 feet on the Afon Pyrddin in the Waterfall Country district of Brecon Beacons National Park, making it the second-highest waterfall in South Wales.

Its encircling cliffs form a natural barrier that separates the steep-sided lower gorge from the more open upper reaches of the river. Reaching the fall requires genuine effort. It lies about 0. 6–0.

8 miles upstream from the popular Sgwd Gwladus, but there is no maintained path for most of that stretch. Walkers must cross the river several times — wading water that can reach two feet deep in wet conditions — and navigate a precarious section of bank.

Because of this, the waterfall sees far fewer visitors than its downstream neighbour, despite sitting only a short distance away on the Elidir Trail corridor.