Flathead Lake’s Cromwell Island, unfinished mansion now for sale

Cromwell Island
Credit: Top 10 Real Estate Deals

FLATHEAD CO., Montana — Montana’s Cromwell Island and an unfinished mansion that sits on it are now for sale, but you should know the property comes with a long-term resident. 

Cromwell Island sits in the middle of Flathead Lake, which is supposedly home to Flessie the water monster. 

Flessie is said to be very similar to Loch Ness’ Nessie, but decked out with deer antlers. 

The legend was started over 100 years ago by the Kutenai Indian Tribe. And locals know that a buck will swim until he drowns from exhaustion in pursuit of a pretty doe. 

The island boasts approximately 2,900 feet of shoreline and was purchased by antique collector and explorer Robert M. Lee in the late 1980s. He and his wife built the exterior shell of a 45,000-square-foot home and a guest house. 

The guest house was completed, but Lee died in 2016 before the interior of the main house was finished. 

Potential buyers will have free rein to design the inside, accompanied by striking views of the water and snowcapped Mission Mountains. 

Cromwell Island and the mansion are being sold for a combined $72 million.

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