A woman hiker in Colorado was found dead on a remote trail on Wednesday, believed killed by at least one mountain lion. If confirmed, this would be Colorado's first fatal mountain lion attack since 1999. Hikers discovered the woman’s body on the Crosier Mountain Trail, north of Denver near the Wyoming border, and saw a mountain lion nearby. They threw rocks to scare off the animal and found no pulse on the woman, said Colorado Parks and Wildlife (CPW) spokesperson Kara Van Hoose. “IIt is not known if one or more mountain lions were involved,” Ms Van Hoose said. Two mountain lions were euthanized after an extensive search. Investigators are checking these animals for human DNA to find the attacker. Authorities shot a lion that ran from the scene and later tracked it to euthanize it. They also euthanized a second lion found nearby. If none is linked to the attack, the search for another animal will continue. CPW rules require euthanasia of wildlife that kills a person for public safety. The woman, believed to have been hiking alone, showed signs of a mountain lion attack. Her identity has not yet been released, but her next of kin were notified. The Crosier Mountain Trail is a quiet, cell-signal-poor area. Law enforcement agencies and volunteer firefighters helped with the search. A biologist on a helicopter deer survey assisted by searching and transporting personnel. Houndsmen used dogs to track lion scents, a common method to find these solitary animals. Mountain lion attacks are rare in Colorado, with only 28 recorded since 1990. Also known as pumas or cougars, these cats are mostly found in 15 western US states and prefer living and hunting alone.