There are places deeply valued by those who know them, yet rarely introduced to the broader luxury market. Michigan's Upper Peninsula is one of them. At 3870 Grand Oak, architectural detail, craftsmanship, and scale converge to create one of Iron Mountain's most distinguished private waterfront homes, nearly adjacent to Pine Mountain Ski & Golf Resort. Set on 1.21 acres with 145 feet of sandy frontage on a private all-sports lake, the property pairs refined living with an immersive four-season lifestyle. Professionally landscaped grounds include a newly constructed stairway and boardwalk leading to a circular lakeside fire pit and an impressive 40-foot dock with approximately 300 square feet of "dock porch" space designed for gathering at the water's edge. The home also adjoins 12 acres of uninhabited state land, providing a natural buffer and added privacy. Inside, 3,960 square feet above grade and 996 finished square feet in the walkout lower level total 4,956 square feet of finished living space, with 6,824 square feet overall including unfinished areas. Italian marble, extensive custom maple cabinetry and millwork, and floor-to-ceiling transomed windows define the interiors. Three fireplaces, one wood burning and two gas, anchor the main living areas. The chef's kitchen features a Miele induction cooktop, Wolf built-in oven and microwave, custom cabinetry, and a breakfast nook with distant views of the Pine Mountain ski jump. The private primary suite occupies its own wing with veranda access, dual walk-in closets, spa bath, and dedicated workout room. The lower level offers guest flexibility, entertaining space, workshop potential, and substantial storage. Swim, boat, fish, snowmobile, ski, golf, and explore directly from your neighborhood. This is Upper Peninsula living at a scale rarely offered.