Serene Mountain Ranch Retreat on 5 Private Acres at the end of the road with a seasonal stream.Welcome to 258 Post Boy Road, an exceptional mountain property nestled in the heart of Boulder's scenic Sugarloaf area. This 2-bedroom, 2-bath home with a study that has been used as a guest room. This ranch-style home offers over 2,400 finished square feet of tranquil living space on a sprawling 5.04-acre wooded lot-complete with evergreen trees, rock outcroppings, and sweeping views of the snow-capped Back Range and foothills. Step inside to a warm and inviting main level featuring rich wood floors, a freestanding fireplace, and an expansive eat-in kitchen with southern exposure that fills the home with natural light. The main floor includes a primary bedroom plus a study, a full bath, and a spacious living room, while the finished basement boasts a 2nd bedroom, an additional bath, a laundry area, and a versatile rec room-perfect for guests, hobbies, or a home office. Enjoy the peace and privacy of mountain living with the convenience of a 2-car attached garage, private well, and propane heating. Outdoor lovers will appreciate the deck for entertaining, proximity to trails, and zoning 3+ horses-all accessible via a private road built to county standards. Built in 1971 and well-maintained, this home blends rustic charm with modern functionality. Whether you're looking for a full-time residence, mountain getaway, or multi-generational space, 258 Post Boy Rd offers an unbeatable opportunity to own a slice of Colorado serenity just minutes from downtown Boulder.