18309 Hollowtree In Riverside's Mockingbird Canyon, this 5-bedroom, 5-bathroom estate offers a rare combination of privacy, usable land, and extensive improvements designed for both everyday living and entertaining. More than an acre of fully gated grounds features mature landscaping, expansive lawns, terraced gardens, and outdoor amenities including a covered patio with built-in BBQ, saltwater pool, basketball court, RV access and parking on both sides of the property, and a 6-car garage with epoxy flooring and direct backyard access. Inside, the flexible floor plan is well suited for multi-generational living, with 3 bedrooms and 3 bathrooms located on the first level. The primary suite (upstairs) includes a fireplace, sitting area, dual walk-in closets, and a private bath with separate tub and shower. An office, loft, custom sunroom, bathroom (with pool-access), and multiple living areas provide space for work, recreation, extended family, and guests. Large windows, high ceilings, dual-zone HVAC, supplemental mini-split systems, and two fireplaces enhance comfort throughout. Additional features include owned solar, extensive infrastructure improvements including drainage systems, and ADU potential.