Slide Mountain is the highest peak in the Catskill Mountains of the U.S. state of New York. It is located in the town of Shandaken in Ulster County. While the 4,180-foot (1,270 m) contour line on topographic maps is generally accepted as its height, the exact elevation of the summit has never been officially determined by the U.S. National Geodetic Survey or its predecessors, and many informal surveys suggest the mountain may actually top 4,200 feet (1,280 m) above sea level.

The Catskill Mountains, also known as the Catskills, are a physiographic province and subrange of the larger Appalachian Mountains, located in southeastern New York. As a cultural and geographic region, the Catskills are generally defined as those areas close to or within the borders of the Catskill Park, a 700,000-acre (2,800 km2) forest preserve protected from many forms of development under New York state law.