Ysgyryd Fawr (English: Skirrid) is an easterly outlier of the Black Mountains in Wales, and forms the easternmost part of the Brecon Beacons National Park. The mountain is often referred to locally as just The Skirrid. The smaller hill of Ysgyryd Fach or "Little Skirrid" (270m) lies about 4.5 km / 2.5 mi to the south.