689 Crystal Mountain ***BACK ON THE MARKET*** Buyers could not perform. Welcome to one of the most exclusive opportunities in the City of Riverside-an extraordinary Mediterranean-style estate tucked within the prestigious Stellan Ridge Estates, widely considered one of the finest locations in all of Riverside. This is more than a home... it's a private retreat, a statement of luxury, and a lifestyle that's hard to replicate. Set on an expansive 1.81-acre lot, this property offers the perfect balance of privacy and usability. Over half an acre of flat, usable land (approx. 27, 000 sq ft) is yours to enjoy, while the remaining acreage is maintained by the association in its natural state-preserving the beauty, space, and serenity that make this setting so special. With 4, 600 sq ft of total living space, including a 3, 703 sq ft main residence and a 897 sq ft detached casita, this thoughtfully designed single-story estate delivers both functionality and elegance. The positioning of the home and casita was strategically planned to capture sweeping panoramic views of city lights, rolling hills, and surrounding mountains-offering breathtaking sunsets and sparkling evening vistas. The main residence features 4-5 bedrooms, 4 bathrooms, soaring 10-foot ceilings, high-end wood flooring, plantation shutters, and abundant natural light throughout. The spacious layout includes a great room, formal living room, and dining room, along with a luxurious primary suite complete with a sitting area, spa-like bath, and expansive walk-in closet. A detached 1-bedroom, 1-bath casita provides flexibility for multi-generational living, guests, or a private home office. Resort-style outdoor amenities include a pool and spa, built-in BBQ island, firepit, mature landscaping, artificial turf areas, and an oversized driveway with a basketball court-perfect for entertaining and everyday enjoyment. Upgrades include Venetian plaster finishes, dual Lennox HVAC systems, fully paid solar (69 panels), Tesla EV charger, epoxy garage floors with built-in storage, custom closets, smart home lighting, whole-home security and camera systems, water softener and reverse osmosis system, and more. Located in Alessandro Heights near shopping, dining, parks, and with convenient access to the 91, 60, and 215 freeways. This home is perfectly located put this one on your must see list and schedule your private showing today.