The High Sierra is the nickname for the Sierra Nevada, referring to its high mountain peaks and rugged terrain.

The Sierra Nevada is often called The High Sierra because it is home to some of the highest mountain peaks in the contiguous United States, including Mount Whitney, the highest peak in the lower 48 states. The term "High Sierra" emphasizes the range's elevation and its dramatic, towering terrain. This nickname is widely used by hikers, climbers, and outdoor enthusiasts, who recognize the region for its challenging landscapes and breathtaking views. The High Sierra is known for its rugged wilderness, alpine lakes, and diverse ecosystems.