This is the Open Space Park itself highpoint. About 200' horizontal and 80' vertical up from one of the switchbacks along the Too Long Trail on the North side ridge. There is no sign announcing the boundary of O.S. / DMP land. There is further down near the scenic lookout junction. Instead go uphill from the second switchback left-bound above that junction. Keep going, the layer on the global topo app is off by 100' both N and W. Look for the orange stake, and short metal BM tube.