Trebiffen Farm and the adjacent farm known as Carn Agos are hill farms situated in an Area of Outstanding Natural Beauty overlooking the cliffs and sea near Boscastle, North Cornwall. The farmstead is traditional in appearance dating back several hundred years and there are now two dwellings on the site. There is some evidence of occupation dating back to mediaeval times and which is documented.

Trebiffen is currently a working farm used to rear sheep and beef with some incidental vegetable production. Much of the ground is hilly and is all unspoilt. Wildife and interesting flora are abundant in the fields, hedgerows, woods, rough grazing areas and adjoining the springs, ponds and stream.