Edison Trail to Whiting Ranch is a 6.1 mile out and back trail located near Lake Forest, CA that offers scenic views. The trail is rated as moderate and primarily used for hiking.
I hope this is the Harding Road at the end of Modjeska Canyon Road that starts at the Tucker Wildlife Sanctuary. If it is then I don't think it is part of Whiting Ranch but close to it. We wanted a training hike as we are doing the Grand Canyon in a few weeks. We were nervous about the 90 degree heat that had been predicted so we started early (7:30) and found that we were in shade most of the way up. The various markings that had been indicated in our hiking book were not there (gone since the fire) so we just kept climbing. The views get better and better the higher you go. The trail was a wide fire road (I think) and very few offshoots We could see Whiting Ranch and the Modjeska grade trail from several viewpoints. Our day was very clear and you could see from Palos Verdes to Catalina to Laguna Beach.
The trail goes on but we turned around at about 6 miles in. Great workout!