Gates of the Arctic National Park & Preserve

Gates of the Arctic National Park & Preserve covers 7,523,898 acres of the central Brooks Range in northern Alaska, making it the second-largest national park in the United States. The entire park sits above the Arctic Circle, roughly 200 miles northwest of Fairbanks, spanning from the Endicott Mountains in the east to the Schwatka Mountains in the west. There are no roads, no maintained trails, and no developed facilities anywhere inside the park; every visitor travels by small aircraft, river float, or on foot across open tundra. About 11,000 people visit each year, placing it among the least visited of the 63 national parks and one of the few places in the United States where wilderness travel is entirely unmediated by infrastructure.

Complete roadlessness across 7.5 million acres — no paved roads, no unpaved roads, no maintained trails, and no visitor centers or campgrounds inside the park, making it the most infrastructure-free national park in the United States.
Six federally designated Wild and Scenic Rivers — the Alatna, John, Kobuk, Noatak, North Fork Koyukuk, and Tinayguk — drawing paddlers on multi-week expeditions through remote Brooks Range valleys.
The Arrigetch Peaks, a cluster of sheer granite spires rising above the Alatna River valley and one of the most sought-after technical climbing destinations in arctic North America.
The Western Arctic caribou herd, which has numbered over 200,000 animals and completes two migrations across the park annually on routes the Nunamiut people have followed for more than ten thousand years.

By air from Fairbanks: Flying is the standard way to reach the park interior. Bettles, a small community about 35 miles south of the park's southern boundary, is the primary gateway — roughly 170 air miles northwest of Fairbanks. Scheduled flights to Bettles operate from Fairbanks International Airport (FAI) through small regional carriers; flight time is approximately 1 hour. From Bettles, air taxi operators fly charter flights to gravel bars, lake shorelines, and designated landing areas inside the park. Charter bookings for specific backcountry destinations are arranged through Bettles-based or Fairbanks-based operators; contact the NPS for a current authorized-operator list.

By road (Dalton Highway): The Dalton Highway (AK-11), commonly called the Haul Road, runs along the park's eastern edge. Coldfoot (Mile 175) and Wiseman (Mile 189) sit at or near the park's eastern boundary. Driving from Fairbanks to Coldfoot takes approximately 5 to 6 hours. The road is mostly unpaved north of Livengood and requires a high-clearance vehicle; flat tires are common and spare tires are essential. From Wiseman, visitors can walk into the park on foot without an aircraft. The Arctic Interagency Visitor Center in Coldfoot is staffed in summer and provides trip-planning services.

By air from Anchorage: Ted Stevens Anchorage International Airport (ANC) is approximately 530 air miles south of Bettles. Most visitors connecting from outside Alaska fly into Fairbanks (FAI), which is the regional hub for interior and northern Alaska air taxi operations. Direct connections from Anchorage to Bettles are possible but less common.

The Brooks Range formed during a collision of tectonic plates in the Cretaceous period, roughly 120 to 150 million years ago. An oceanic terrane moving from the north was thrust southward onto the edge of North America, folding and stacking older sedimentary rocks into a series of thrust sheets that now form the mountain ridges. The dominant rock throughout the park is Devonian and Carboniferous limestone and dolostone — originally shallow marine sediments — deformed into the walls and ridges visitors see today. Fossil corals and marine invertebrates occasionally appear in outcrops along river valleys, a reminder that this Arctic landscape was once a tropical sea floor.

The Arrigetch Peaks are a geological anomaly within the range. They are composed of granite, an intrusive igneous rock that crystallized from a magma body forced into surrounding sedimentary rock roughly 90 to 100 million years ago. Because granite weathers into smooth, steep walls with sharp edges rather than the layered, rounded forms of limestone, the Arrigetch Peaks rise as near-vertical spires while the surrounding range erodes into more gradual slopes. The name "Arrigetch" comes from an Athabascan word meaning "fingers of a hand extended" — a description that captures the form of the peaks as seen from the valley.

Glaciers sculpted the modern landscape during the Pleistocene ice ages. Valley glaciers carved the U-shaped profiles visible in the major river drainages; cirques and aretes mark the upper elevations. Small glaciers and permanent ice patches remain at higher elevations in the eastern park, though they have retreated significantly over the past century. The broad, flat valley floors that make river travel and cross-country hiking possible are largely glacial outwash reworked by rivers — flat gravel plains extending between glacier-carved ranges.

The park straddles the Arctic Continental Divide. Rivers north of the divide drain to the Arctic Ocean via the Colville system; rivers to the south drain to the Yukon and ultimately the Pacific. The Noatak River, one of the park's six Wild and Scenic Rivers, originates near the Continental Divide and flows west more than 400 miles through the park and beyond to Kotzebue Sound.

The Western Arctic caribou herd migrates through the park twice annually — moving north in spring from boreal forest wintering grounds south of the Brooks Range, and south again in fall. At recent population peaks the herd has numbered over 200,000 animals. Cows and calves concentrate on north-facing tundra slopes in June; the fall migration in September and October pushes the largest aggregations through traditional mountain passes. Anaktuvuk Pass is the most famous of these crossings, used by the Nunamiut for thousands of years and still a focal point for subsistence hunting by village residents.

Grizzly bears are present throughout the park and highly visible on the open tundra from May through October, feeding on ground squirrels, caribou calves, berries, and roots. Wolves range in packs across the Brooks Range and are present year-round; they are harder to spot than bears but genuine sightings occur in the open valleys. Dall sheep inhabit rocky ridgelines and are often visible from below with binoculars — white against dark rock at the higher elevations. Wolverines, lynx, and Arctic foxes are present but rarely encountered.

Moose are found in willow and spruce stands in the lower valleys, particularly along the southern rivers where woody vegetation is denser. Golden eagles nest on cliff faces throughout the park and soar above ridgelines regularly in summer. Rough-legged hawks, gyrfalcons, and peregrine falcons breed in the park and are active through summer months. The rivers support Arctic grayling, lake trout, northern pike, and chum salmon in some drainages; fishing requires an Alaska state license.

Mosquitoes are the most unavoidable wildlife from late May through mid-August. They peak in July. A head net and permethrin-treated clothing are practical necessities for early-summer visits, not optional accessories.

The Nunamiut, an Inland Inuit people, have lived in the Brooks Range for at least ten thousand years, following the Western Arctic caribou herd through the mountains on annual hunting cycles. Their camps at Anaktuvuk Pass and other high passes represent some of the longest continuously occupied sites in Arctic North America. When the national park was created in 1980, the ANILCA legislation specifically recognized the Nunamiut people of Anaktuvuk Pass, protecting their subsistence hunting rights and acknowledging the village's continuing presence inside the park boundary. About 300 Nunamiut residents live in Anaktuvuk Pass today, accessible only by aircraft.

The Koyukon Athabascan people occupied the river valleys on the southern flank of the Brooks Range, living in seasonal camps along the Koyukuk River and its tributaries. Their descendants continue to live in the communities of Allakaket, Alatna, and Hughes downriver from the park. Both the Nunamiut and Koyukon peoples maintain subsistence rights in the park under ANILCA.

Robert Marshall, a forester, wilderness advocate, and co-founder of The Wilderness Society, first explored the Brooks Range in 1929 and returned multiple times through the 1930s. On a journey up the North Fork of the Koyukuk River in 1930, he looked north at two peaks flanking the valley and wrote in his journal that he had reached the "gates of the Arctic." He named the western peak Frigid Crags and the eastern peak Boreal Mountain. Marshall's accounts of the region — especially his book "Alaska Wilderness" — built public awareness of the Brooks Range as a place worth protecting. He died in 1939 at the age of 38, before the wilderness movement he helped create achieved its major legislative victories.

President Jimmy Carter proclaimed Gates of the Arctic a national monument on December 1, 1978, using the Antiquities Act after Congress failed to pass Alaska lands legislation. Two years later, the Alaska National Interest Lands Conservation Act (ANILCA), signed on December 2, 1980, established Gates of the Arctic National Park & Preserve at its current size of 7,523,898 acres. The same law created or expanded nine other Alaska national parks, including Wrangell-St. Elias, Denali, and Kenai Fjords. ANILCA remains the largest single land conservation action in U.S. history.