Walk, walk, walk. It is excellent exercise and easy on the joints. It is suitable for us seniors who frequently have old injuries. Here is a robust hike for you. Iron Mountain is in Poway at Highway 67 and Poway Road. There is a large parking lot before a trail that leads to the summit. The track is walker-friendly and doesn’t get steep until the last quarter mile. The views from the top are spectacular. The hike is very popular so go during the week if possible. In season watch out for rattlesnakes and the heat!