Billionaire businessman and avid art collector Bill Koch has officially put his Elk Mountain Lodge estate in Aspen, Colorado, on the market for $125 million. Tucked away in a pristine 52-acre alpine valley, the estate is a rare combination of luxury, seclusion, and natural beauty, offering a once-in-a-lifetime opportunity for a buyer seeking an exclusive retreat in the heart of the Rocky Mountains.

Located just 10 miles from downtown Aspen, the sprawling estate offers panoramic views of the Elk Mountains and Castle Creek, setting the stage for an unparalleled lifestyle of outdoor adventure and sophisticated living. Originally purchased by Koch in 2007 for $26.5 million, the property was once a working dude ranch before being meticulously transformed into a private luxury compound. After acquiring an additional 31 acres, Koch initially listed the estate in 2015 for $100 million, later reducing it to $80 million before selling off part of the land for $14.5 million in 2020. The remaining 52-acre parcel, now being offered for sale, had previously been available as a luxury rental for $35,000 per night or $300,000 per week.

A masterpiece of mountain architecture

The estate, known as Elk Mountain Lodge, is a testament to refined craftsmanship and rustic elegance. The 16,600-square-foot main lodge serves as the heart of the property, featuring seven bedrooms and eight bathrooms. The interiors are thoughtfully designed to embrace the natural surroundings, with flagstone floors, 30-foot vaulted ceilings, wood-paneled walls, and numerous fireplaces that exude warmth and grandeur.

An elegant 20-seat dining room provides the perfect setting for lavish dinners, while a climate-controlled wine cellar ensures that every bottle is preserved at the perfect temperature. Additional highlights of the main residence include two studies, a screening room that doubles as an altitude-acclimation chamber, and expansive floor-to-ceiling windows that frame breathtaking mountain views.

Adding to the estate’s accommodations are seven guest cabins, bringing the total living space to nearly 25,300 square feet, with 14 bedrooms and 17 bathrooms. One of the cabins is currently used as a state-of-the-art gym, while others serve as private retreats for family and guests.

An outdoor playground in the heart of Aspen

The estate is designed for outdoor enthusiasts, offering an array of recreational amenities that make the most of its Rocky Mountain setting. The property features two hot tubs, private ponds, and miles of scenic hiking and cross-country skiing trails, providing year-round opportunities for adventure.

Nestled along Rooney Circle, a private road named after Koch’s wife Bridget Rooney Koch, the estate offers unmatched privacy while remaining close to the world-class restaurants, luxury shopping, and cultural experiences that Aspen has to offer.

A legacy property with global appeal

Bill Koch, a member of the ultra-wealthy Koch family and founder of Oxbow Carbon Corporation, is no stranger to high-end real estate. In addition to Elk Mountain Lodge, he owns properties in New York City, Palm Beach, and Cape Cod. He is also the owner of Bear Ranch, a 4,500-acre estate in Paonia, Colorado, where he has meticulously created a replica of an Old West town, demonstrating his passion for history and preservation.

Koch’s decision to list Elk Mountain Lodge comes as he and his wife transition into a new phase of life, now that their children have grown. Recognizing the strength of the Aspen luxury real estate market, where median sale prices have skyrocketed from $4.95 million in 2016 to $13.23 million in 2024, he sees this as the perfect time to pass the estate on to its next steward.

An exclusive opportunity to own a slice of Aspen’s elite landscape

With its unparalleled natural beauty, expansive living spaces, and unmatched amenities, Elk Mountain Lodge is more than just a home—it’s a legacy estate. Whether as a private mountain retreat, a family compound, or a trophy property, this Aspen masterpiece stands as a once-in-a-generation opportunity for a buyer looking to secure a luxurious escape in one of the world’s most coveted destinations.