Picture this: you're camped high along the Continental Divide Trail, pre-dawn and frosty, when the whole valley starts to roar. Not machinery, not wind — a bull elk, bugling from a ridge in the grey half-light, claiming the mountain for his own.

That's the scene a long-distance hiker described in a recent trail journal for The Trek, and it's a lovely reminder of what makes the CDT different from more famous routes. The writer describes the call in layers: a deep thrum felt through the ground, a whistling, almost birdlike howl, then a guttural squeal aimed at nearby females, all building into a bellow that echoes off canyon walls long after it ends. This is elk rut season behaviour — autumn, roughly September into October — when bulls across the Rocky Mountains announce their dominance from dawn until dark.

The hiker watched the animal, a huge grey silhouette against the sunrise, stand motionless after each call, listening. When a faint answer finally drifted over from the far side of the mountain wall, the bull tilted his antlers back and marched straight over the ridge toward it, gone before his own call had faded. Total time in view: a few minutes. The kind of sighting no wildlife documentary quite replicates, because you're standing in the cold in your sleeping clothes hearing it through your own ears.

There's a wry coda, too. Lower down, the trail passed a hunters' camp — two camo tents, a fire ring, a cracked, unbloodied arrow shaft leaned against a stone. The hunters, apparently still asleep, would have no luck that morning. The writer reflects that they've no quarrel with fair-chase hunting; they'd simply rather leave the mountain saying 'once there was a great animal, and for all I know there still is.'

Why should a holidaymaker care? Because the CDT and its offshoot trails offer exactly this: unscripted wildlife drama in some of the wildest country in the lower 48 states. You don't need to thru-hike 3,100 miles to get a version of it. Day hikes and section walks in Colorado's San Juan Mountains, Wyoming's Wind River Range or Montana's Bob Marshall Wilderness put you in bull elk territory during the autumn rut — just carry earplugs-free motivation to get up before sunrise. Bring binoculars, keep a respectful distance (elk during the rut can be genuinely aggressive), and note that hunting season overlaps with the fall hiking window, so wear bright colours and expect company in the backcountry.

The Trail: The Trek