During rut season, bulls are highly protective of their harems and may charge if they perceive a threat. Locals have jokingly dubbed the phenomenon “Elk Rut Fever,” pointing to the “symptoms” seen in both elk and humans this time of year. Elk Rut Season (Graphic courtesy Estes Valley Watershed Coalition)Officials emphasize there is no cure—except safe observation. “Visitors should always keep a respectful distance, use binoculars or zoom lenses for photos, and never attempt to pet or feed elk,” wildlife educators note. Adding to the seasonal atmosphere, Estes Park will host Elk Fest this weekend, celebrating the rut with music, food, and educational programs.