If you have trouble viewing the PDF (about 1.3 MB in summer and about 750 kb in winter), try right-clicking on the link for the issue you'd like to see and choose "save target" or "save link as," save the file to a convenient place, and then open it once it has finished downloading.
NOTE: The Yosemite Today has been replaced by theYosemite Guide. For information about activites, hours of operations, etc., please see theYosemite Guide.