Discreet. Elevated. Resort-Inspired. Set on the third-largest lot in Hermosa Beach, Hidden Hermosa is a rare, resort-style estate blending exceptional scale, privacy, and a deep connection to nature. Spanning over half an acre, the property feels worlds away from the coast while remaining just moments from the beach, downtown Hermosa and Manhattan Beach, and the Valley-Ardmore greenbelt. Inspired by the timeless elegance of Montecito and Santa Barbara-style compounds, the home presents understated sophistication from the street before unfolding into a lush sanctuary. Mature palms, bamboo, and layered tropical landscaping surround the estate, creating a tranquil retreat enhanced by the valley setting, which offers calm evenings, minimal coastal wind, and sound that carries inward rather than outward, ideal for entertaining and everyday serenity. The main residence spans approximately 7,400 square feet and offers six bedrooms, including five upstairs and one on the main level, complemented by a fully detached one-bedroom ADU guest house providing complete independence. Soaring 25-foot ceilings, expansive glass, and French doors create seamless indoor-outdoor flow, while warm wood floors, exposed beams, and custom cabinetry bring refined comfort throughout. Open-concept living spaces extend effortlessly to the backyard grounds, supported by a Savant home automation system, private movie theater, and thoughtfully updated amenities. Upstairs bedrooms enjoy terrace access overlooking the grounds, while the primary suite serves as a true retreat with vaulted ceilings, fireplace, direct outdoor access, a custom walk-in closet, and a spa-like bath with serene garden views. Outdoors, the estate operates as a self-contained resort, anchored by a lagoon-style saltwater pool and spa with waterslide and zip line. Entertaining areas include an outdoor kitchen, fire pit, gazebo, dining spaces beneath towering palms, a 1,000-square-foot multi-sport court, putting green, horseshoe pit, and outdoor shower. The guest house sits quietly within the gardens, visible yet fully separate, offering a peaceful retreat for extended stays, guests, or creative use. A refreshed garage with high-gloss floors, abundant storage, and a Tesla charging station adds convenience. Tucked within a quiet cul-de-sac yet minutes from the sand via a hidden cut-through, Hidden Hermosa is a once-in-a-generation coastal compound, defined by scale, serenity, and luxury.