Hidden Valley Zen Center is a Zen meditation retreat located in San Marcos, California. As a part of the Rinzai Zen School, the practice emphasizes seated meditation (zazen) with the objective of achieving a deep sense of Awakening and applying it to all aspects of life. To achieve this purpose, the practice welcomes earnest Zen practitioners of all backgrounds, offering seated meditations regularly during mornings, intensive meditation retreats, and introductory classes for those curious about Zen Buddhism. Founded in 1968 by Tien-li Lola Lee, the Center is currently led by Mitra Roshi, who is supported by Sozui Sensei, the junior teacher in residence.

Situated amongst peaceful oaks in the hills north of San Diego, Hidden Valley Zen Center offers an accessible option for residents of the North County area or Orange County seeking a spiritual haven. As it is a somewhat rural setting, HVZC is best reached via car from Highway 15 or Highway 78. The location includes a labyrinth and other quiet outdoor settings ideal for reflection and walking meditation. The Center also offers lodging for retreats, which can be booked via telephone.