The Blue Hole is a deep swimming hole roughly 15 - 20 feet deep and VERY cold located on Peekamouse Mountain, about 9 miles from the Catskills-Retreat. There is another area just upstream from this location that is just spectacular, see images below. The Falls image of which there are two located to the right as you are driving to the swimming hole. Please help to keep it clean if you carry it in, carry it out.