Colorado reports surge in black bear sightings and attacks

Colorado is experiencing a significant rise in black bear sightings and conflicts in 2026, with over 6,000 reports recorded before September. This surge includes four bear attacks within a single week, the most recent occurring in Jefferson County on August 21, which left a man with non-life-threatening leg injuries. This marks the sixth bear attack in the state this year.

Colorado Parks and Wildlife noted that such a rapid succession of attacks is unusual. Experts suggest that drought conditions are a primary driver, as a lack of water in mountain regions pushes hungry bears toward more populated areas in search of food.

In areas like Aspen, residents frequently encounter American black bears. Research from Colorado State University and other agencies indicates that bears are highly adaptive; they expand their use of urban environments when natural food sources are scarce but tend to decrease their presence in human-dominated areas when natural food becomes abundant.