The Castlemorris - Holly Loop is a 3 mi looped trail that starts and ends in Aghaviller, Ireland. The trail is considered to be medium to hike and has a total elevation gain of 338 ft. Normally the trail takes 1 day to complete but can be finished in less than a day. Either you are not allowed to bring your dog on the Castlemorris - Holly Loop or it is generally not advised. The warmest months are June, July, and August and the coldest months are December, January, and February. The wettest months are March, April, and May and the driest months are December, January, and February.Photo: Wild Ireland tour