Sign up
Log in
Results
View all 93 pictures

Cromwell Island

A one-of-a-kind private island on iconic Flathead Lake, Cromwell Island offers unmatched scale, privacy, and history. Featuring nearly three miles of shoreline and a grand unfinished estate, it is a once-in-a-generation opportunity.

Highlights

Largest known private freshwater island west of the Mississippi under single ownership
Grand, partially completed 45,000+ sq ft residence with monumental architecture
Panoramic views of Wild Horse Island and legendary Flathead Lake
Rich Native American history and enduring mystique rooted in the land

Description

Like the cold, clear waters of Flathead Lake, mystique surrounds Cromwell Island. It overlooks the legendary Wild Horse Island, where the Salish and Kootenai Tribes historically swam their horses to protect them from rival tribes. In the 1930s, construction began on a dam near Polson, Montana, at the outlet of the Flathead River. Before its completion, Cromwell Island would sometimes become a peninsula during periods of low water. It is highly likely that Native Americans used this land bridge to herd their horses before swimming them across to Wild Horse Island. Today, Cromwell Island is a full-time island and the entirety of it is now for sale.

Flathead Lake, with nearly 200 square miles of surface area and 185 miles of shoreline, is the largest natural freshwater lake west of the Mississippi River yes, even bigger than Lake Tahoe. Cromwell Island, spanning nearly 350 acres with almost three miles of shoreline, is believed to be the largest private freshwater island west of the Mississippi held under a single ownership.

Like Loch Ness, Flathead Lake even has its own monster. Rooted in the ancient oral traditions of the Kootenai Tribe, tales of a massive, antlered lake creature date back centuries. The first recorded sighting came in 1889, when a steamboat captain and 100 passengers reported seeing a “whale-like” object that dove after being shot at. Locals eventually dubbed the creature “Flessie” a playful nod to her Scottish counterpart.

Cromwell Island was purchased in the late 1980s by Robert M. Lee, a renowned automobile and antique arms collector, explorer, author, and conservationist. Before his passing in 2016, Mr. Lee and his wife, Anne, began construction on a monumental residence of over 45,000 square feet intended as their full-time home. Even in its unfinished state, the structure commands a presence reminiscent of Versailles.

The mystique endures. Cromwell Island is now for sale, offering a rare opportunity for a new owner to write the next chapter of a truly storied place.

Read More

From elevation to risk assessment

Search for detailed parcel information including; Elevation & Vegetation Maps, Ownership Information, Detailed Parcel Information, Crop History Map, Soil Survey Productivity Data, and more.

Research Parcel Information

Directions

Property Video

Resources

Links
Property Website
Attachments
Contact Seller

Hall and Hall

Visit Website
(406) 360-3141
Missoula, MT
Premium Seller

About Bill McDavid

Raised between Alabama and the Cayman Islands, Bill joined Hall and Hall as a ranch partner in the fall of 1996. He came to Montana to work as a fly-fishing guide and ranch hand during a summer break from law school. Bill returned to Montana after graduation and became the Tribal Prosecutor for the Crow Tribe. In addition to his law degree, Bill holds an undergraduate degree in music from the University of Miami and remains passionate about his music. He is also a skilled photographer specializing in underwater imagery with images having been published by National Geographic, the BBC and elsewhere. He is an FAA licensed UAS (drone) Pilot which he uses for real estate photography and cinematography. He is also a hospice volunteer and dedicated practitioner of hot yoga. It was inevitable that he found his way into a real estate career as the profession stretches back four generations in his family. His love of the northern Rocky Mountain region compelled him to move to Missoula where he handles transactions in the backyard as well as those stretching from Florida to California. Bill is currently licensed as a real estate broker in Montana (RRE-BRO-LIC-8609), Idaho (#AB00021997), Florida (#BK3229636), Georgia (#347418), Tennessee (#317360), and California (#01455038).

Seller Resources

Bill McDavid

Hall and Hall
View Phone Number
By clicking the button, you agree to our Terms of Use and Privacy Policy.