Set in one of Forest Knolls' most peaceful pockets, 10 Cortez Avenue is a soulful West Marin cottage that lives larger than its room count. Private, sunny, and surrounded by the natural beauty of the San Geronimo Valley, this 1-bedroom, 1-bath home unfolds across two levels with warmth, character, and surprising flexibility. A refreshed entry path sets a quiet, welcoming tone. Inside, the main level opens to an inviting dining enclave, then flows into a darling kitchen overlooking the living area and a comfortable office or reading nook framed by sunny valley outlooks. A full bath completes a main level that feels efficient, thoughtful, and full of personality. The kitchen also opens to one of two decks, creating an easy outdoor extension for morning coffee, lunch in the sun, or a quiet reset between calls. Downstairs, a generous primary suite creates a cozy retreat, anchored by a classic potbelly wood stove and offering space for rest, relaxation, and quiet escape. Additional storage and utility areas add practical function. The larger lower deck is where the home really begins to exhale, with sunny valley views, privacy, and room to gather for sunset conversations, weekend meals, or simply enjoying the stillness that makes this corner of Marin so special. Set on an approximately 4,500 sq. ft. lot with parking for two cars and close proximity to the Cortez Fire Road trailhead, the property offers immediate access to the hiking and biking network of the San Geronimo Valley, along with many of the area's favorite destinations Pump Espresso Bar, Lagunitas Market, the Farm Stand, Samuel P. Taylor State Park, Papermill Creek Saloon, and nearby downtown Fairfax. 10 Cortez is not oversized, overdone, or trying too hard. It is something better: a charming mountain cottage with heart, privacy, useful space, and an unmistakable sense of place a full-time home, weekend hideaway, creative retreat, or quiet basecamp for West Marin living.