Rocky Mountain National Park, U.S.

Rocky Mountain National Park: The Elk Rut in September Is One of America’s Best Free Wildlife Events

Rocky Mountain National Park in north-central Colorado covers 415 square miles straddling the Continental Divide, roughly 90 kilometres northwest of Denver. About a third of the park is above treeline at elevations exceeding 3,350 metres. It receives 4 to 5 million visitors annually, more than Yellowstone, concentrated in a few accessible corridors – which means summer weekends have a genuine crowding problem in the Bear Lake area.

Go in September or early October if you can. The elk rut begins in mid-September and the bulls bugling across the meadows of Horseshoe Park and Moraine Park at dawn is one of the more extraordinary wildlife experiences available anywhere in the continental United States at no cost. Large bulls gather harems of cows, produce territorial calls that carry across the valley, and occasionally block roads in configurations that are simultaneously inconvenient and memorable.

The Timed Entry System

Rocky Mountain requires timed-entry reservations for most vehicle access between May and October, obtained through recreation.gov. Peak summer dates (July and August) sell out within minutes of release, typically 12 days in advance at 8am Mountain Time. This is an imperfect system; plan ahead or enter before 9am or after 3pm in the reservation period – though the specific rules change by zone and season. Check the current system at nps.gov/romo before your visit.

Alternative: stay in Estes Park, the eastern gateway town, and access the park before the reservation period begins. The wildlife does not know about the reservation schedule.

Trail Ridge Road

Trail Ridge Road traverses the park east-west, reaching 3,713 metres at its highest point, making it the highest continuous paved road in the United States. The road passes through conifer forest, across alpine tundra, and along ridges with views of snowfields and distant peaks. Several pull-offs give short tundra walks above treeline. Rock Cut at 3,671 metres has a paved path where you can walk among alpine wildflowers and see marmots and pikas.

Open roughly Memorial Day through mid-October. Driving through end to end takes about 2 hours without stops; plan 4 to 5 hours with stops.

The Hikes

Emerald Lake from Bear Lake (5.5 kilometres return, 207 metres elevation gain) passes through Nymph and Dream Lakes before reaching Emerald, which reflects Hallett Peak. The most popular hike in the park for good reason.

Flattop Mountain (15 kilometres return, 891 metres gain) continues above Emerald Lake to tundra and the summit at 3,988 metres. Long and demanding.

Longs Peak (24 kilometres return, 1,583 metres gain) is the only 14,000-foot peak in the park. The Keyhole Route involves Class 3 scrambling and requires a very early start (2 to 4am) and 10 to 15 hours round trip. Several unprepared hikers die on this mountain each year. Check current conditions at the trailhead kiosk.

Estes Park

The gateway town at the eastern entrance (population about 6,000) has accommodation, restaurants, and the Stanley Hotel – the inspiration for Stephen King’s The Shining, which offers tours. The Estes Park Visitor Center has current trail and road conditions.