Welcome to this remarkable residence on Mt. Sanitas in sought-after Lower Pine Brook Hills! Just over 3 minutes from Broadway, this unique property offers both convenience to Boulder and an extraordinary location. Set on a 1/2 acre of flat and sloping land, it combines the very best of mountain living with ease of access. Surrounded by incredible natural beauty, the expansive 4,818 sq. ft. home is located near the end of a quiet non-thru street, adjacent to Open Space and a trailhead. The property is a light-filled haven in the midst of nature. Step through a private courtyard into the inviting entrance, with 2-story foyer and glass staircase highlighting vistas and natural light. Southern exposure features iconic Boulder vistas while bathing common spaces in sunlight. Stylish design provides space and privacy with 4 bedrooms and baths flowing across 4 gentle levels. Elegant raised dining space opens to the grand living room, boasting vaulted ceilings & fireplace, while 2-story windows showcase stunning Mt. Sanitas and Flatiron views. Sunken library/office adds privacy & sophistication. Open kitchen, breakfast nook & family room w/fireplace round out this floor. The entire upper level is the primary suite wing, with vaulted ceilings, 5 piece ensuite bath, laundry, large windowed walk-in closet and private balcony w/stunning south & west views. The lower level offers generous flex space; ideal for in-laws, nanny, or guests with separate entry & courtyard, sauna, hot tub, wet bar & fireplace. A covered gazebo off the courtyard provides outdoor space for entertaining or solitude. Other features include high-efficiency boiler and radiant heat throughout, while fire hydrant and enhanced drainage provide safety & peace of mind. This is a rare opportunity to make your dream home in one of Boulder's most desired neighborhoods. Immerse yourself in privacy, elegance and natural beauty while enjoying luxury mountain living at it's best in this extraordinary property!