The Rondout Valley lies on the southern edge of the Catskill Mountains. This reservoir was built in the 1930s and 1940s, displacing the settlements of Eureka, Montela and Lackawack. It now serves as the central collecting reservoir for New York City's Delaware system. The Delaware water system supplies half of New York City's water, 65 miles southeast of Rondout Reservoir, the water taking a complicated path through the Delaware Aqueduct, which tunnels under the Hudson River.

A highly challenging route taking in 7 of the 10 highest mountains in the Mournes and Northern Ireland, by following the historic Mourne wall. The summits include Slieve Binnian, Wee Binnian, Slievenaglogh, Slieve Muck, Carn Mountain, Slieve Loughshannagh, Slieve Meelbeg, Slieve Meelmore, Slieve Bearnagh, a more northerly Slievenaglogh, Slieve Commedagh and finally Slieve Donard (at 853m the highest mountain in Northern Ireland).