There has been little to no data compiled for Colorado regarding humans being killed by animals. This is surprising, considering how wide an array of dangerous animals live in Colorado. You could be gored by a Mountain Goat's horns, attacked by a Cougar, bitten by a rattlesnake, catch Rocky Mountain Spotted Fever from a tick, or be bitten by a venomous spider like the Black Widow or Brown Recluse.
While Cougar attacks aren't extremely common, they are arguably the hardest to get away from of all the state's deadly creatures. In the last hundred years, there have been two reported incidents wherein Colorado cougars killed people.
In 1991, Scott Lancaster was attacked and killed while he was out jogging in the hills of Idaho Springs, CO, and 10-year-old Mark Miedema was killed in 1997, after he ran ahead of his family on a hike in Rocky Mountain National Park.
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