San Luis Obispo County, California packs coastal bluffs, oak-studded canyons, and volcanic peaks into one of the state's most varied hiking regions. Walk the Shell Beach Bluff Trail above the Pacific, follow the Bob Jones Trail toward Avila Beach, or head inland to Lopez Canyon and Pine Mountain for longer, quieter miles. From Morro Bay to San Luis Obispo and Lopez Lake, the scenery shifts fast and stays memorable.