Hi there! I went up DeCosmos last summer, when the gates were open, via your green line. I parked close to the end of it and hiked to both summits. The true summit is not driveable, but you can park close to the west summit and bushwhack across the saddle. There is a flagged route (more of a suggestion than a trail per se) that I guess must occasionally be used to service the radio towers (there is a helipad on the east summit).
Anyway, the summit area is very rocky and very overgrown. It's tough to hike up there, let alone drive.
Hi there! I went up DeCosmos last summer, when the gates were open, via your green line. I parked close to the end of it and hiked to both summits. The true summit is not driveable, but you can park close to the west summit and bushwhack across the saddle. There is a flagged route (more of a suggestion than a trail per se) that I guess must occasionally be used to service the radio towers (there is a helipad on the east summit).
Anyway, the summit area is very rocky and very overgrown. It's tough to hike up there, let alone drive.