This is a rare opportunity to own one of the last remaining 5+ acre parcels in the highly sought-after Castle Pines/Happy Canyon corridor. Priced at just $12.61 per square foot-or approximately $549,000 per acre-this homesite offers exceptional value when compared to other large-lot listings in the area. With over $1M in improvements already in place, including a beautifully updated 2-bedroom guest house, private well, natural gas, septic, and a paved driveway, this land is ready for your dream estate. The 5.37-acre Executive Equestrian Lot features multiple level building envelopes, is heavily treed with mature ponderosa pines, and enjoys incredible privacy surrounded by 105 acres of open space. Stunning Front Range views, abundant wildlife, and ultimate seclusion make this a truly unmatched opportunity for a luxury build. No HOA. No timeline to build. Bring your vision to life in one of the most exclusive enclaves in Castle Rock.