From downtown Bariloche:

Bus: Line 20, descend at Puerto Pañuelo, Llao Llao.

SUBE card needed to pay bus fare. Check timetable.

Turisur, a travel agent, offers the transfer to the Port.
Navigation from Puerto Pañuelo to Puerto Blest, then a short bus ride (3km.) with the same company Turisur to Puerto Alegre, where another boat will cross the Frias Lake to Puerto Frias.

The entrance fee to the National Park and the boarding fee must be paid at the port prior to boarding.

Turisur.
www.turisur.com.ar

Navigation on Lake Nahuel Huapi and Lake Frias.

This is the only company which has a concession to navigate from Puerto Pañuelo (Llao Llao) to Puerto Blest with a daily service.

For this part of the navigation you may hire a private service, though you must make sure that the company is licensed in the National Park.

This is a self-guided trail that starts at the pier at Puerto Cántaros, which you can get to via a 5 minutes navigation from Puerto Blest or an easy hike in the forest around the bay.

The ascent up the boardwalk takes roughly one hour, has 4 lookouts on the way with views of the waterfalls, the Valdivian forest and the Cántaros Lake. At the end of the trail there is a specimen of the Alerce tree of over 1.500 years.

Follow the same way down.

Pay attention to the catamaran timetables to head back to Bariloche.