After having done this section of the Pacific Crest Trail last year in the other direction, I was joined in May for an east-west traverse of it with Tom Chester, RT Hawke, Walt Fidler and Adrienne Ballwey. It was a beautiful day when we parked at the Lightning Ridge and PCT parking area at mile marker 78.10 on the Angeles Crest Highway, 4 miles west of the San Bernardino County line at an elevation of 7360'. According to Tom's page on Blue Ridge Summit, this is the point where the Angeles Crest Highway reaches its highest point while crossing the Blue Ridge, named for the distinctive blue-gray Pelona schist. It is 4.6 miles trending downhill to Vincent Gap at 6585'. An asterisk next to the common name indicates a non-native taxon. See Tom's flora for this section of the PCT here
. The picture above shows the summit of Mt. Baden-Powell.