Kastelruth borders the following municipalities: Barbian, Campitello di Fassa, Völs am Schlern, Lajen, Urtijëi, Waidbruck, Ritten, Santa Cristina Gherdëina and Tiers.
Kastelruth giáp các đô thị: Barbian, Campitello di Fassa, Völs am Schlern, Lajen, Urtijëi, Waidbruck, Ritten, Santa Cristina Gherdëina and Tiers.