Hough was also a conservationist. One of his projects for "Forest and Stream" was to survey Yellowstone National Park in midwinter 1893, with a guide and 2 soldiers from the nearby fort of the same name. There were supposed to be more than 500 buffalo there, but their count barely reached 100. Due to Hough's report, eastern newspapers took up the cause against poaching, and in May 1894 the U.S. Congress passed a law making poaching of game in national parks a punishable offense. Later, he and other "Saturday Evening Post" writers wrote a letter for Stephen Mather and George Horace Latimer to sign, advocating the creation of a national park system. The National Park Service was created in 1916. In addition, he was a co-founder of the Izaak Walton League, an organization of outdoorsmen, in 1922. He wrote the "Out-of-Doors" column for the "Saturday Evening Post" and these columns later appeared in book form.