This is a nice introduction to the character of Ballyhoura, which is the premiere trail center in Ireland. The trail system features a number of increasingly lengthy, but not necessarily more difficult, nested trails. Greenwood Loop is the first of these.
It begins with a gentle climb out to the turnaround point (or continue on the Mountrussell Loop (Brown Loop)
to extend the fun). The return trip is a blast: a fast, mostly downhill singletrack descent through the verdant forest.
The natural singletracks feature root and rock obstacles as well as some boardwalk sections to protect particularly sensitive areas of the forest floor. For those not lucky enough to be born Irish, you can't begin to appreciate how green the forest and surrounding countryside is.
The trailhead features toilets, showers (for both people and bikes), and bike hire.