County of Ulster
Ulster County Parcel Data metadata

New York State Department of Transportation
Ulster County Roads File metadata

New York State Department of Environmental Conservation
New York State Freshwater Wetlands metadata

Federal Emergency Management Agency
Q3 Digital Flood Data metadata

United States Fish & Wildlife Service
National Wetlands Inventory metadata. Data in the quads Kerhonkson, Clintondale, Napanoch, Ellenville, and Woodridge is currently not available. Status of unfinished quadrangles

 Wetlands Interactive Mapper, refer to the specific quads in New York State
National Wetlands Inventory  Wetlands Interactive Mapper