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Why do people believe mountain lions are on the rise?

April 5, 2026

Quick Answer

People believe mountain lions are on the rise due to increased sightings, encounters, and reported attacks, which some attribute to habitat expansion, human-wildlife conflict, and a growing population.

Habitat Expansion and Human-Wildlife Conflict

Mountain lions are native to western North America, and their range has expanded over the years. In the United States alone, their territory now covers over 10 million square miles, with populations present in at least 13 western states. As human settlements and agricultural lands encroach on natural habitats, mountain lions are forced to adapt and inhabit areas closer to human populations, increasing the likelihood of encounters. In California, for example, mountain lion sightings have increased by over 50% in the past decade, with 65% of those sightings occurring in urban areas.

Growing Population and Sightings

The mountain lion population is estimated to have increased by 15% in the past decade, with some studies suggesting a population growth rate of 6-8% per year. This growth is attributed to various factors, including habitat expansion, prey availability, and reduced human-caused mortality. With a growing population comes an increased likelihood of encounters between humans and mountain lions. In areas like Colorado, where mountain lion sightings have increased by over 200% in the past five years, residents are advised to be aware of their surroundings and take precautions to prevent encounters.

Prevention and Response Techniques

To prevent mountain lion attacks, it’s essential to take proactive measures, such as keeping pets on a leash, making noise while hiking, and avoiding walking alone at dawn, dusk, or night. If a mountain lion is encountered, stay calm and try to appear larger by standing up straight and spreading arms. In the event of an attack, use any available objects as a deterrent, such as hiking poles, rocks, or even your hands. In Colorado, where mountain lion attacks have increased, residents and visitors are advised to carry bear spray or other deterrents as a precautionary measure.

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