The 120k route has changed slightly this year but it still includes the famous climb of the vee from the Clogheen side. Then the return will bring you back over the mountains via a different, but equally picturesque, route. Outside of those two climbs the route is relatively flat and very enjoyable.
Registration from 8:30am in Clogheen. 120K starts at 10:00am sharp. Don't forget to change your clocks.