Taken at 16:53 PST (00:53 Nov 19 UTC) from Shingle Springs
The plane is Cathy Pacific Cargo 2081, about 110 miles from my viewpoint.
It's interesting because the plane is at 36,000 feet, which makes the view angle under 4 degrees, so I'm practically viewing the contrail from edge on. I shot video (real time)
It's interesting that you can see the trail first dip down, and then gradually rise up again. Here the red line indicated the path of the plane:
Here it's adjusted so the flight path is level:
And finally scaled vertically 10x, so you can see the curving path the exhaust takes.