The Cerro Bandera trail is the first part of the Dientes de Navarino trail in Puerto Williams.
It's easily accessible from the town, with a short 40 min walk to the main road to the Aerodrome and Puerto Navarino. The trail starts along the road to the town water supply where the road splits at Plaza de la Virgen.
From the town water supply, the trail heads into the forest of Northofagus trees that are typical of the area.
The path climbs steeply up the hill until it reaches the first of the lookouts. From here you can see Puerto Williams, the Beagle Channel and far in the distance, Ushuaia.
From this lookout the trail becomes considerably steeper as it winds through further forest until you ascend past the treeline where there is a second lookout.
From here it's a very steep ascent to the flag at the top.
The Bandera (flagpole) commands views across the valley to the Beagle Channel.
The trail continues up the mountain and from the H5 and H6 waypoints you can get beautiful views of the lagoons, mountains and river.
The trail follows the side of the mountain and is very steep and difficult terrain. Sadly I had run out of time to continue and it had started to rain - so the prospect of more mountain trekking was impractical.