Laguan Blance - Morro Chico at 1:185,000 on heavy-duty, waterproof and tear-resistant, paper. GPS-compatible map from SIG Patton Maps.

The reverse is Rio Verde at 1: 121,000 with tourist facilities including accommodation and campsites, etc. 
Map also covers Isla Riesco and Las Nieves. The map shows local roads and tracks, and symbols indicate locations with tourist facilities, sites for trekking and watching local fauna, etc. Also marked are ferry connections. The map has a UTM grid, plus latitude and longitude margin ticks at 1º. 

This is the current edition, published in December 2015. 

When unfolded, size is approx. 30" x 20" Retails for $16.95, no ISBN, if you can find one, copyright 2015

Outstanding detail, and personally researched by the Cartographer. You won't find a better more detailed map of the area.