It's the most wonderful time of the year in Rocky Mountain National Park, and not only due to the temperate cool weather and the brilliant rainbow spectrum of color gracing the falling leaves. Yet another lovely natural phenomenon marks the season, rightfully inviting a heavy flow of tourist traffic to marvel at a quite special visual and sonic drama that unfolds in the park each Fall.

From mid-September to mid-October, Rocky’s wild elk population finds itself in the thrills and throes of a relatively short and massively important mating season we call “rut”. During this time, elk cows gather in loose groups called “harems” in the lower meadows, attracting bulls from the high country who compete for dominance. Afluster with hormonal spikes and bestowed with newly-shed antlers, males young and old arrive refreshed and ready for hearty sparring. These modest migrations and purposefully rowdy behaviors make elk much more widely visible in closer proximity to humans during these weeks than other times of year, inspiring elk-themed festivals and celebrations in neighboring towns such as Estes Park.

However, while a good antler vs. antler fight will surely never disappoint any enthusiastic wildlife watchers, elk rut’s more musical detail rather steals the spotlight. The sound of a dominant bull’s unmistakable multi-faceted mating call, which we call a “bugle”, carries for miles and somewhat defies simple explanation. Consisting of resonant growls, low grunts, and (perhaps most iconic of all) a high-pitched whistle, bugles defy comparison to other commonly-known and easily-described sounds. Many bugles can often be heard simultaneously or overlapping, making for a magnificent if somewhat haunting symphony scoring the already impossibly glorious scenery.

Hark! Visitors are advised to arrive at the park the first hour before and after sunrise for the most ideal opportunity to best appreciate elk activity during rut. But behold and beware; love - and war - is in the air!