The estate sits just 17.7km from downtown Aspen, and Koch, 84, who built his fortune through oil and investments, told the Wall Street Journal that he and his wife, Bridget, felt it was the right time to sell.
“[We] looked at the strong housing market and figured it was time to let someone else enjoy it,” he said.
The estate includes eight structures, featuring a (1,545sqm) main lodge with seven bedrooms and eight bathrooms. The lodge boasts 9-metre ceilings, a formal dining room, two offices, a media room, and wine storage.
Rustic elements such as flagstone flooring, log beams, and a floor-to-ceiling stone fireplace enhance the luxurious mountain aesthetic.

Beyond the main residence, the property has seven guest cabins, including one designed as a state-of-the-art gym. There are 14 bedrooms and 17 bathrooms in total.
The estate also features two hot tubs, two ponds, and multiple hiking trails, with breathtaking views of the Elk Mountain Range.
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This is not Koch’s first attempt to sell the estate. In 2015, he listed it for $100 million (AUD $152 million), later dropping the price to $80 million (AUD $122 million).
At the time, he offered buyers the option to purchase the original 21-hectare property with the main lodge for $60 million (AUD $91 million), while an additional 12.5-hectare parcel was listed separately for $20 million (AUD $30.5 million).
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WSJ reports the 12.5-hectare parcel eventually sold for $14.5 million (AUD $22.2 million), while Koch retained the main estate.
The home has also been available for rent at $35,000 (AUD $53,500) per night or $300,000 (AUD $458,000) per month, catering to ultra-wealthy visitors seeking privacy and exclusivity in the Aspen Valley.
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Listed by Steven Shane of Compass, the estate is being marketed as “a once-in-a-lifetime opportunity to own Aspen’s premier multi-generational estate.”