Northern California County Grapples With Unprecedented Mountain Lion Activity

El Dorado County is seeing a startling surge in mountain lion activity. Residents report bold, unsettling encounters ranging from daytime sightings to attacks on pets and livestock. Wildlife biologists are noticing a disturbing behavioral shift: lions now often ignore screams and human presence, appearing indifferent to attempts to scare them away.

Data paints a clear picture. From an average of 33 animal attacks per year, incidents spiked to 97 in 2023 and exploded to 202 by 2024. Domestic victims include sheep, goats, horses, llamas, and pets; in early 2025 alone, 50 cases were already reported.

Tragedy struck when two brothers were mauled last year while searching for deer antlers. One was killed and the other seriously injured despite following all recommended safety measures, a sobering reminder of how serious and unusual these encounters have become.

Proposed solutions are hotly debated. One idea known as “tree and free” would employ trained dogs to chase lions up trees to restore their fear of humans. This approach faces resistance from wildlife advocates, who warn that such methods often end badly and may result in unnecessary lion deaths.

Others propose reinstating controlled hunts, while conservation groups push for nonlethal deterrents like alarms, lights, and better fencing to reduce human-lion conflict.

With human and lion territories increasingly overlapping, innovative coexistence strategies are urgently needed to ensure safety—for both people and wildlife.