This is part of the works for the Mica Gem Mine group. there are some foundations down the hill and I remember seeing one collapsed mine in the area, may be part of the claim. This is off of Mica Gem Mine Road.
I apologize for not give out directions to most of my trips, trails change and I do not have the time to keep the site always updated. My hikes also span from the easy to the extreme, a lot of places do not even have trails, as well as extreme conditions. Some sites need to be protected as they are fragile and historically sensitive. So if you decide to hike some of these areas, do your research and know your limits, have the proper provisions .Every year many hikers die from not understanding these Simple Rules. San Diego County and surrounding areas are diverse in climate and terrain. Remember if you do decide to Hike do your research, carry the essentials and do so at your own risk. An alternative is to join one of the many hiking groups such as meetup or on facebook ,as well as other social sites. Not only is there safety in numbers but a pooling of knowledge.