Airplanes take off from SFO and turn north, as seen from the Berkeley hills. There were no landings and no southerly takeoffs in the ~60 minutes I took photos. Presumably all flights left on the same path and made course corrections out of frame, farther from the airport.
Nikon 55-300 @ 300mm. From a series of long acquisitions. Some of the light trails are much more faint than others because increasing water condensation on the front of the lens dramatically lowered the contrast of the later images, and the light trails faded into the orange haze (the haze was later removed in processing).