17-year-old Brice Diel was riding his motorcycle in the area of State Road 549 -- or the Old Las Cruces Highway -- and Stirrup Road at about 8:20 Tuesday night when he struck a cow that had wandered onto the roadway.
Diel was wearing a helmet, but had lost consciousness when emergency responders arrived. A passing motorist called 9-1-1 about the accident.
Diel was treated at the local hospital and then transported to University Medical Center in El Paso, where he is listed in critical condition in the intensive care unit.