The lower ( south ) summit of Twin Sisters is the site of a pre World War II crash on 24 October 1941 of an Army Air Corps B-18A Bolo bomber that killed all five crew members during a relatively short flight from Hamilton Field military air base to nearby McClellan Field . The south summit is also the highest privately owned peak in the San Francisco Bay Area , which led in 2003 to the building of a controversial house , the " house above the morning clouds " , very close to the summit crash site by '' Cigarettes Cheaper ! '' entrepreneur John Roscoe . This led to subsequent calls for county ordinances to prevent future ridge-top building . Roscoe reportedly spent $ 34 million buying the property and building the house , then put it up for sale in 2005 for $ 19 million . Following his felony conviction for fraud in 2011 , the house was listed for $ 4.9 million , and it finally sold in 2012 for $ 3.4 million . This house burned to the ground on Tuesday , 10 Oct 2017 when the Atlas Fire burned over 51,000 acres in the northern California wine country over several days in early October 2017 . What little wreckage of the B-18A bomber remains is located only from the driveway leading to the charred ruins of this house
Atlas Fire
Atlas Fire
Twin Sisters (California)