Night time. Large triangle w/3 lights sighted hovering 75 ft over ground. Banked and flew fast over city, lost altitude then vanishedNight time. Driving northward on Redlands Parkway. See bright white lights hovering over neighborhood. Closed distance and observed three bright white lights in an equilateral triangle pattern and two smaller red blinking lights (one dead center, the other between two of the triangle points) hovering perfectly still about 75-100 ft above ground. Could vaguely make out a the dark edges of the hull- also a perfect triangle. Turned onto South Rim Drive to pursue but upon making my turn the craft banked and sped along the geologic ridge. I think they were watching me. Observed the craft fly south, then bank southeast, then bank again northwest and fly directly over the city at about 200 ft altitude. Craft gradually lost altitude over St Mary's Hospital, then vanished.