San Bernardino County, California packs together high alpine summits, pine-rimmed lakes, and vast desert horizons in one enormous hiking landscape. Climb toward San Gorgonio Mountain via Vivian Creek Trail, wander the quieter shoreline at Silverwood Lake, or pick up a stretch of the Pacific Crest Trail above the San Bernardino Mountains. From Jenks Lake to the open Mojave edge, this is California at its most expansive.