In early September, a new fence was being built in the Jacumba Wilderness. It’s called the Jacumba Wilderness, because it is an isolated, often extremely rocky area which few people visit, except for hikers and off-roaders. The Jacumba Wilderness is about 11 miles wide. There has been no border barrier at all other than the ruggedness of the natural terrain.
There are a couple of valleys in the Wilderness, where they are building 30-foot bollard fence. This photo below is of the Skull Valley, named apparently for those who unsuccessfully try to cross in this area. The contractor has built a paved road into the area.
Click on the image to expand the view.
Below is video from last year of the Jacumba area. A crew is also staging near the town of Jacumba and will be expanding the existing 15-foot high border fence in that area. They are preparing to extend the fence up slopes in that area and probably will be replacing 0.7 miles of old landing mat fence near the small town of Jacumba.