The Borscht Belt, or Yiddish Alps, is a colloquial term for the mostly defunct summer resorts of the Catskill Mountains in parts of Sullivan and Ulster counties in the U.S. state of New York, straddling both Upstate New York and the northern edges of the New York metropolitan area.

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.