Route to and from Crohane from parking in a farmyard at W042 851. Asked permission from a house at W042 853 and was directed to parking further up the valley beside a house with a friendly and aging labrador. From here head south on a good track through a mix of farmalnd initially.
This track goes far further than indicated on the map, although it deteriorates a bit as it rises, it is usable almost to spot height 458.