Rocky Mountain National Park

Paleo-Indians hunted here thousands of years ago, and the Ute and Arapaho peoples later hunted and camped in the high country and valleys. The effort to create a park was led most prominently by Enos Mills, a naturalist and writer from the Estes Park area, supported by conservationists such as James Grafton Rogers and J. Horace McFarland. President Woodrow Wilson signed the Rocky Mountain National Park Act in 1915. According to the National Park Service, the park was included in UNESCO's international system of Biosphere Reserves on January 17, 1977.

Rocky Mountain is a good place to see how climate changes with altitude. The montane zone, from about 5,600 to 9,500 feet, holds ponderosa pine and Douglas fir and open meadows such as Moraine Park and Horseshoe Park. The subalpine zone, about 9,000 to 11,000 feet, is spruce-fir forest dotted with lakes such as Sprague Lake and Odessa Lake. Above roughly 11,000 feet lies alpine tundra, where the growing season can be as short as about 40 days and wildflowers bloom in a rush. The Never Summer Mountains and the Kawuneeche Valley on the west side hold the headwaters of the Colorado River.

The National Park Service counts about 66 to 67 native mammal species and roughly 280 bird species in the park. Elk are the most visible: the park's summer population is roughly 2,000 to 3,000, and moose, which the National Park Service says were not historically recorded in this part of the Rockies, are now commonly seen, especially on the west side. Roughly 350 bighorn sheep live here. The National Park Service lists grizzly bears, gray wolves and bison as locally extinct, and lynx and wolverines as extremely rare. Keep a safe distance from all wildlife, particularly elk during the autumn rut.

Trail Ridge Road, part of U.S. Route 34, links Estes Park on the east with Grand Lake on the west over about 48 miles. Built largely by the 1930s (finished to Fall River Pass by 1932 and to Grand Lake by 1938), it crests at 12,183 feet and the National Park Service describes it as the highest continuous paved highway in North America. About 11 miles run above treeline. The Alpine Visitor Center, at 11,796 feet, is the highest visitor center in the National Park System. The road closes for winter and is usually open from late May to mid-October, depending on snow, so check the NPS for current conditions.

Bear Lake is the best-known trailhead and gateway to walks such as Emerald Lake. The Tundra World Nature Trail near Rock Cut is a short walk across high alpine terrain. Longs Peak is a demanding full-day climb for experienced hikers. Old Fall River Road, a one-way gravel road, offers a slower route up to the tundra.

• The park receives over four million visits a year (about 4.1 million in 2023), so peak summer days are busy.
• A timed-entry reservation system has operated from May to October since 2020, and its details change, so confirm requirements on the NPS website before you go.
• Altitude is a real factor: take it slowly, drink water, and watch afternoon thunderstorms above treeline.
• Weather can shift quickly even in summer.

Three entrances are near Estes Park on the east side and one is near Grand Lake on the west. A private tour from Denver avoids the need to drive the mountain road yourself, with a private vehicle, driver and door-to-door pickup, leaving the group free to watch for wildlife from the windows.