Of the 10,000 acres of old-growth redwood forests in the Santa Cruz Mountains, less than 1,000 acres remain unprotected in small, fragmented patches across the region. But what does old-growth really mean? Although old-growth has no one agreed upon definition, read on to learn more about what old-growth means for Sempervirens Fund and why it matters for the forests, wildlife, and people in and around the Santa Cruz Mountains.