The above track is from Oct 1, 2014.
BOE1 is a flight number given to Boeing test aircraft. In this case, it's A 787-900, flying to and from Boeing Field in Seattle. This is an aircraft that is not yet in service and is going through various tests to ensure everything is working. In this case it looks like it was doing some high speed turns and climbs.
Other flights of BOE1 show similar unusual flights that are typical of test flights