Llwynstyffilin Farm is a small, quiet campsite near Maescar in Powys, Wales, set in the Brecon Beacons area of the United Kingdom. The site offers a handful of levelled gravel hardstandings alongside a sloping field, with electric hook-ups available.

Toilet and shower facilities are provided on site and are noted by visitors as clean and well-maintained. The farm sits within easy reach of Pen y Fan, one of the most popular peaks in the Brecon Beacons, making it a practical base for hillwalking.

Its rural setting means mobile and internet connectivity can be limited.