Tullydermot Falls is a remarkable waterfall located in the Cuilcaigh Mountains near Swanlinbar, in north Cavan. The site is one of thirty-four sites which make up the Marble Arch Geopark.
The waterfall is easily accessible by foot and by wheelchair or buggy users with a trail going from an information station at the parking lot.
The Falls occur in the upper reaches of the Claddagh River, which is a tributary of the river Erne. An ideal location for picnic on a nice summer day.