Abstract
The Sierra San Pedro Mártir in the state of Baja California, Mexico, is known for its excellent conditions for astronomical observations. It offers a series of potential locations, with altitudes above 2650 m for the installation of large telescopes. Some sites are quite remote and adequate site evaluation access routes have to be devised. Six potential sites were visited in summer 2005 either by foot or using a 4WD vehicle in order to search for suitable places for the installation of large telescopes and site evaluation access routes. GPS coordinates were obtained and possible access routes were devised. Photographs, a brief description of each zone, observed rocks as well as general comments are presented.
