Seventeen campers fell ill in San Juan National Forest in La Plata County after exposure to an unknown gas cloud Tuesday night, according to the Upper Pine River Fire Protection District. About 9 p.m. Tuesday emergency responders with Upper Pine River Fire Protection District (UPRFPD) were dispatched to the Vallecito Campground in the San Juan National Forest on a report of ten people who became ill “by an exposure to an unknown gas,” the UPRFPD said in a news release. Responders were met by the campground host, and 17 people from four campsites reported illness ranging from wheezing to nausea, along with throat and nose irritation.