This Monday public holiday Namadgi day walk visits the summit of Mt Orroral (1609m), the highest of the granite peaks between the Orroral River and Rendezvous Creek valleys. Starting at the old Orroral Tracking Station, the first 4km of the route involves a mostly unrelenting 400m climb up a fire trail to a Geodetic Observatory known as the Lunar Laser Range. The effort is rewarded with increasingly better views out across Orroral Valley to the ridges beyond. From the observatory we head south-west through potentially thick and nasty scrub for about 1.1km, ascending a further 190m to eventually scramble through huge boulders and stone ramparts onto the granite tors of Mt Orroral. The mountain views from the summit’s rock platforms are superb. Amongst the peaks that, weather permitting, will be visible are Mt Gudgenby, Mt Namadgi, Mt Ginini and Mt Bimberi. If time and enthusiasm allows we’ll return to Orroral Valley by heading south-east from the summit, descending 400m over 2.5km to reach the Nursery Swamp walking track which we’ll follow 1.5km back to the road. Otherwise it’ll be about 5km back the way we came.