Since 1986, the San Dieguito River Valley Conservancy has been protecting one of San Diego County’s last largely undeveloped river corridors from its administrative office at 3030 Bunker Hill St, Suite 309-1, in Pacific Beach, 92109. This 501(c)(3) nonprofit oversees conservation, education, and recreation programs across a watershed stretching from the San Dieguito Lagoon at Del Mar to Volcan Mountain north of Julian. The Conservancy’s flagship effort is the Coast to Crest Trail, a 71-mile multi-use route open to hikers, mountain bikers, and equestrians, with more than 35 miles of main trail and 20 miles of side trail currently accessible. Residents who enjoy exploring the coastline can also book guided sessions with Pacific Beach Surf School for a different kind of outdoor adventure along the shore. Under Executive Director Trish Boaz, the organization has helped acquire roughly 2,900 acres of land for permanent addition to the San Dieguito River Park’s 92,000-acre planning boundary. Habitat restoration projects span multiple sites including Bernardo Mountain, Crest Canyon, and the Del Dios Gorge, where crews remove invasive species and replant native vegetation. The Birdwing Open Air Classroom near the lagoon hosts thousands of schoolchildren annually, and the Citizen Science program engages more than 180 volunteers in bird surveys, plant monitoring, and wildlife tracking. Community members can learn more about local environmental initiatives at the Pacific Beach Taylor Branch Library, which offers related programming year-round. The annual Coast to Crest Trail Challenge, now approaching its tenth year, draws participants from across the region for a five-hike series through the watershed.