Fan Frynych is the northernmost peak of the Fforest Fawr massif in the Brecon Beacons National Park, South Wales.

The summit is marked by a trig point, where the northern face of Craig Cerrig-gleisiad can be viewed.

[2][3] Being 'mountain' and/or 'moor', the entire mountain is mapped as open country and hence freely available to walkers under the access provisions of the CROW Act 2000.

A network of paths and tracks cross its summit plateau and link with public rights of way to east, west and north.

The 99 mile Beacons Way passes over Craig Cerrig-gleisiad immediately to its south, affording views over Fan Frynych's southern slopes and connecting with a path running the length of the east side of the plateau.