Route over Knocknamanagh, its NE top, Gullaba Hill and Bird Hill.
A variation on Simon3's track 2559, extended to take in Knocknamanagh itself and using a more direct line on the descent.
The route parks on a hairpin bend at W01636 66453, where there is room for a couple of cars among the scattered bales of sileage, goes through a gate onto a track that heads steeply upwards. Around W011 662, we headed directly upwards off the track towards the rim of the coum and followed the edge around to Knocknamanagh. From there the route to the NE Top, Gullaba and Bird Hills is straightforward. Descending from Bird Hill, we headed south with a touch of east towards some obviously cultivated fields and from there regained the road which we followed back to the car.
The terrain was particularly hard going in parts, with snow on the ground fairly extensively above 500m.