A jagged mountain range is a type of mountain range characterized by sharp peaks and ridges. The two crossword solutions for this term are 'Sierras' (7 letters) and 'SIERRA' (6 letters). The Sierras is a mountain range located in the western United States, stretching from California to New Mexico. It is one of the longest mountain ranges in the world and is home to some of the highest peaks in the contiguous United States. SIERRA is also a Spanish word meaning 'mountain range'.