Most likely a test or training flight. U-2 planes often fly similar profiles.
The proximity of the Naval Air Warfare Center and Edwards AFB and the four parallel tracks aligned NE/SW would support this along with a variety of 'target' areas.
A large urban area (LA), a smaller town (Bakersfield), a run along the main route from LA to Bakersfield, forested areas, airbase etc.
This would give the pilot and equipment a thorough and useful workout.