No, the Dolomites are located entirely within Italy and do not extend into Switzerland. While both the Dolomites and the Swiss Alps are part of the broader Alpine mountain range, they are geologically distinct. The Dolomites are situated in the northeastern Italian provinces of South Tyrol, Belluno, and Trentino, and are characterized by their unique dolomite rock (a type of carbonate rock), which gives them their iconic jagged, vertical peaks and pale color. The Swiss Alps, by contrast, are located to the west and north of the Dolomites and consist primarily of different rock types like granite and gneiss. If you are in Switzerland and want to see mountains that resemble the Dolomites, the closest geological equivalent would be the Alpstein massif in the Appenzell region, but they are not part of the same range. The boundary between the Italian and Swiss Alps is generally defined by the Rhaetian Alps. Therefore, while you can easily travel between the two regions in a single day—a drive from St. Moritz in Switzerland to the heart of the Dolomites takes about 3.5 to 4 hours—the Dolomites themselves remain a uniquely Italian UNESCO World Heritage site.