The Kauffman House is a rustic log house in Grand Lake, Colorado that functioned as a hotel from its construction in 1892 to 1973. It was built by Ezra Kauffman, a local prospector, trapper and builder of log structures who operated it as a hotel until his death in 1920 at age 71. It was then operated as a summer hotel by his widow and daughters until World …The Kauffman House is a rustic log house in Grand Lake, Colorado that functioned as a hotel from its construction in 1892 to 1973. It was built by Ezra Kauffman, a local prospector, trapper and builder of log structures who operated it as a hotel until his death in 1920 at age 71. It was then operated as a summer hotel by his widow and daughters until World War II.