I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Free car park with picnic tables at what3words /// The simplest way to talk about location. It's an uphill but easy walk of about a mile to Altnaheglish Dam and reservoir from which there are good views back down Banagher Glen and over towards the Sperrin mountains. You can either go back to the car park the way you came or you can follow the path up around the lake and back down through the woods on the other side which turns it into a pretty decent hike, with plenty of space to fly your drone and lots of photo opportunities. There are no facilities on site, with the nearest shops, pubs, toilets etc. being at Dungiven, approximately 10 mins away by car.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 23/09/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.