An outbreak of gastrointestinal distress in the Sierra Nevada has hit Camp Mather, according to San Francisco Recreation and Park Department officials, who operate the park. Although the campground near Yosemite remains open to visitors, an extensive cleaning is under way after three campers and two employees reported symptoms such as sudden vomiting, nausea and diarrhea from July 1 to July 8. Six other cases were reported the prior week. Read More