F. Lewis Clark Mansion was built in 1910 , and it was the most expensive home in Idaho at the time .
Hayden Lake 's natural beauty attracted several wealthy people in the early 1900s .
F. Lewis Clark Mansion was built in 1910 , and Hayden Lake was the most expensive Hayden Lake in Idaho at the time .
Hayden Lake 's natural beauty attracted several wealthy people in the early 1900s .