Cae Adda is a small, family-run campsite sitting on the shores of Llyn Trawsfynydd — the largest man-made lake in North Wales — within Eryri (Snowdonia) National Park, in the heart of the Rhinogydd mountain range.

The site offers two large grass fields for camping alongside two small cabins and a self-catering cottage, all in a secluded lakeside setting. It is well suited to cyclists, walkers, couples, families, and touring travellers, and dogs are welcome.

The site is mainly tent-oriented but accommodates a limited number of campervans, and fire pits with wood available on site add to the atmosphere. Note that swimming and inflatables are not permitted on Llyn Trawsfynydd.

The campsite is generally open from March to October, accessed via a narrow but well-sighted single-track road off the A470.