The location is on top of a small, but extremely steep hill by my house in Fallbrook California. The center of the shot (roughly the 1/3 mid section) is Camp Pendleton. You can tell by the dramatic lines showing the change in scenery from bare hills to agricultural and rural development.
This pano was shot with my Canon t3i. I double shot the sky with the "normal" exposure I would like to have as the overall image and then turned down the shutter speed to do a dark pass. Overlaying these layers in Photoshop allowed me to get a semi-HDR effect in the sky so it was not so blown out.