Right next to the Byway, not far from the Shandaken Town Hall, water shoots down a concrete channel from an opening in the side of the mountain known as “The Portal” - the outlet of the Shandaken Tunnel which brings water 18 miles beneath the mountain from the City’s Schoharie Reservoir and deposits it into the Esopus Creek, which carries it to the Ashokan Reservoir and from there to thirsty millions downstate.