3521 Seymour Rd Rare opportunity with multi-structure development potential in the mountains above Running Springs. This acreage, is part of a small gated community, that offers the flexibility to create a custom estate, a multi-generational compound, or income-producing retreat in a serene, nature-rich setting. The property features multiple flat pads with the potential for building, existing cut-in roads, and sweeping mountain and forest views. Backing directly to the San Bernardino National Forest, it provides exceptional privacy, direct access to open space and a true sense of seclusion. The property also allows horses lending itself to the potential of an incredible equestrian estate. Natural highlights include dramatic granite boulder formations and a seasonal pond, adding character and usability to the land. Preliminary inquiries support the development of a primary residence plus multiple ADUs and accessory structures, including a barn and detached garage offering strong potential for expanded living or rental income (buyer to confirm with county and HOA). Utilities include city water availability, with power nearby for connection (power is already on site); septic system required. Ideally located approximately 15 minutes from Lake Arrowhead and Snow Valley Mountain Resort, and about 35 minutes to Big Bear Lake. Close to local amenities, elementary school, and approximately 90 minutes from Los Angeles. A unique combination of usability, location, and tranquility in a gorgeous mountain community.