Crystal Peak is a prominent peak in the Santa Cruz Mountains in southwest Santa Clara County, California, United States. The landmark lies 10 mi (16 km) west of Morgan Hill, and approximately 0.5 mi (1 km) northeast of Loma Prieta. It is the second highest peak in the Santa Cruz Mountains. The headwaters of Llagas Creek originate on the eastern flank of the peak, and flow southward before merging with the Pajaro River at the San Benito County line.