Insulator on lower milepost 3 trail Trail near insulator - the only one we found on the trail Looking uphill from a creek crossing Creek crossing on lower MP3 trail Skull and bones of some large bird Sign on 4630 road near Oak Grove View from road in Oak Grove - Looking east This is a labelled overview of the oak grove work center with the purpose of each of the buildings and the locations of a couple of buildings that are no longer there. This is a wintertime view from approximately the location of the oak grove ranger station at Oak Grove Work Center. The view is looking east over the grazing meadow.