Gates of the Arctic National Park and Preserve

Lore & Background

The park lies west of the Dalton Highway, centered on the Brooks Range, and includes the Endicott Mountains and part of the Schwatka Mountains. Its eastern boundary generally follows the Dalton Highway at a distance of a few miles, with the Arctic National Wildlife Refuge 10 miles farther east. The park features multiple mountain lakes formed in glaciated rock basins or as moraine-dammed lakes, and six Wild and Scenic Rivers: the Alatna, John, Kobuk, North Fork of the Koyukuk, part of the Noatak, and the Tinayguk.

Reader's Guide

Gates of the Arctic National Park and Preserve is significant for preserving the vast, wild, undeveloped character and environmental integrity of Alaska's central Brooks Range, providing opportunities for wilderness recreation and traditional subsistence uses. The park is the second largest in the U.S., and its wilderness area is the third-largest designated wilderness in the country. It is home to diverse fauna including brown bears, caribou, Dall sheep, and numerous bird species. The park's perennial snowfields and glaciers are decreasing rapidly due to warming temperatures, which also cause permafrost thaw and soil instability. The park has no established roads, trails, visitor facilities, or campgrounds, and the Dalton Highway comes within five miles of its eastern boundary but requires a river crossing to reach the park. Ten small communities outside the park depend on its resources for food and livelihood.

Did You Know?

• Gates of the Arctic is the northernmost national park in the United States, situated entirely north of the Arctic Circle.
• About 85% of the combined park and preserve is protected as the Gates of the Arctic Wilderness, which adjoins the Noatak Wilderness to form the largest contiguous wilderness in the United States.
• The park has no established roads, trails, visitor facilities, or campgrounds.

Scale, Status & the Road to Protection

Gates of the Arctic holds the distinction of being the northernmost national park in the United States, sitting entirely above the Arctic Circle. Its combined park and preserve area spans 8,472,506 acres, making it the second-largest such unit in the country, trailing only Wrangell–St. Elias. The national park portion alone covers 7,523,897 acres. The land's protected status evolved in two stages: it was first set aside as a national monument on December 1, 1978, and then the Alaska National Interest Lands Conservation Act of 1980 elevated it to national park and preserve status. Roughly 85 percent of the combined area carries the additional designation of Gates of the Arctic Wilderness, encompassing 7,167,192 acres. This wilderness adjoins the Noatak Wilderness, and together they constitute the largest contiguous wilderness block in the United States. The park portion of the wilderness ranks as the third-largest designated wilderness area in the nation, behind only the Wrangell-Saint Elias Wilderness and the Mollie Beattie Wilderness, both also in Alaska.

A Landscape Carved by Ice and Divided by a Continental Spine

The park is centered on the Brooks Range, which runs east–west through its middle, and it straddles the continental divide, separating watersheds that flow toward the Pacific from those draining into the Arctic Ocean. To the south of the range, the Ambler-Chandalar Ridge stretches in the same east–west orientation, while the southernmost reaches dip into the Kobuk-Selawik Lowlands, home to the headwaters of the Kobuk River. The range itself has been shaped by repeated glaciation; the most recent episode, the Itkillik glaciation, began around 24,000 years ago and persisted until roughly 1,200 to 1,500 years before present. This glacial history left behind numerous carved valleys, alpine lakes, and moraine-dammed basins. Walker Lake, on the south slope, is the largest at 14 miles long and a mile wide. Six Wild and Scenic Rivers thread through the park, including the Kobuk at 110 miles and the Alatna at 83 miles. The park also incorporates the Endicott Mountains and part of the Schwatka Mountains, with a small detached section wrapping around Fortress Mountain and Castle Mountain to the north.

Extreme Climate, Shifting Ecosystems & Living Wildlife

The park's climate is classified as Dfc under the Köppen system—subarctic with cool summers and year-round precipitation. At the Anaktuvuk Pass Ranger Station, the plant hardiness zone is 2b, and the average annual extreme minimum temperature plunges to −42.6 °F. Winters can dip as low as −75 °F, while brief summer spells can hit 90 °F. The boreal forest, a mix of black and white spruce with poplar, extends to about 68 degrees north latitude, roughly coinciding with the spine of the Brooks Range. North of that line, the landscape shifts to tundra blanketed in mosses and lichens with scattered shrubby willows. The park is home to brown bears, black bears, muskoxen, moose, and Dall sheep. However, warming temperatures are reshaping the landscape: perennial snowfields and glaciers, vital to local ecosystems, lost 13 square kilometers of area between 1985 and 2017. Permafrost thaw is destabilizing soils, exposing bare ground to erosion and triggering slope failures.

Human Presence in a Roadless Wilderness

Despite its vastness, the park contains no established roads, trails, visitor facilities, or campgrounds. The only human settlement within its boundaries is Anaktuvuk Pass, a small Iñupiat community in the park's center, and the only informal access routes are a few ATV tracks leading to and from that village. The Dalton Highway, Alaska State Highway 11, passes within five miles of the eastern boundary, but reaching the park from the road still requires a river crossing. Ten communities outside the park—Alatna, Allakaket, Ambler, Anaktuvuk Pass, Bettles, Evansville, Hughes, Kobuk, Nuiqsut, Shungnak, and Wiseman—are classified as resident zone communities that rely on park resources for food and livelihood. Within the national park portion, only subsistence hunting by local rural residents is allowed; sport hunting is restricted to the preserve, where hunters must hold all required state licenses and permits. About 259,000 acres are owned by native corporations or the State of Alaska, underscoring the deep Indigenous ties to this remote landscape.