Yellowstone's garbage dumps and bear feeding (1872–1970)
For decades, bears in Yellowstone National Park fed on garbage at open dumps, drawing crowds who watched them from bleachers. The practice conditioned bears to human food and produced a steady stream of bear-human conflicts, including maulings of visitors.
The park closed its dumps in 1970, forcing bears to forage naturally and sharply reducing bear-human incidents.
The episode became the founding lesson of modern bear management: feeding bears human food makes them dangerous, and the infrastructure enabling it must be removed entirely.
Opponents of bear baiting invoke this exact mechanism — bait piles teach bears to associate people with food, which they say creates hazards for visitors to Alaska's preserves.
