Brabazon Addition

The Brabazon Addition encompasses 498,819 acres of the Saint Elias Mountains within Tongass National Forest, a landscape defined by steep terrain and high alpine peaks. Mount Aylesworth rises to 9,310 feet, the highest point in the area, with Mount Armour, Mount Jette, and Mount Wade forming a series of summits above 7,900 feet. The Brabazon Range itself reaches 5,046 feet. This mountainous terrain channels water through a complex network of glacial systems and river valleys. The Novatak Glacier and Yakutat Glacier feed the headwaters that drain into the Dangerous River, Akwe River, Italio River, Ahrnklin River, and Antlen River, along with smaller tributaries including Miller Creek, Moser Creek, and Beasley Creek. These waterways carry glacial melt from the high peaks downslope, creating distinct riparian corridors and shaping the distribution of forest communities across the landscape.

The forest composition shifts with elevation and moisture availability. At lower elevations, the Western Hemlock–Sitka Spruce Forest dominates, with western hemlock (Tsuga heterophylla) and Sitka spruce (Picea sitchensis) forming a dense canopy. The understory here is thick with devil's club (Oplopanax horridus), salmonberry (Rubus spectabilis), and other shade-tolerant shrubs. As elevation increases, the Mountain Hemlock–Sitka Spruce Forest takes over, with mountain hemlock (Tsuga mertensiana) becoming increasingly prominent. In riparian zones along the major river valleys, black cottonwood (Populus trichocarpa) creates open-canopy galleries where light reaches the ground. Along stream margins and in disturbed areas, Sitka alder (Alnus alnobetula) and Setchell's willow (Salix setchelliana) form dense shrublands. Above the forest line, alpine tundra and rock-lichen communities occupy the highest ridges and peaks, where Yukon lupine (Lupinus kuschei), vulnerable (IUCN), and Glacier Bay paintbrush (Castilleja chrymactis) bloom among sparse vegetation and lichen-covered stone. The netted specklebelly (Lobaria anomala), imperiled (IUCN), grows on rocks and tree bark throughout the area.

Salmon runs drive much of the food web in this region. Coho salmon (Oncorhynchus kisutch), sockeye salmon (Oncorhynchus nerka), and steelhead (Oncorhynchus mykiss) migrate into the river systems, where they support populations of brown bears and gray wolves that hunt both in riparian zones and across the surrounding forest. Dolly Varden (Salvelinus malma) inhabit the cold headwater streams. In the air above these waterways, American dippers (Cinclus mexicanus) hunt aquatic invertebrates in the current, while harlequin ducks (Histrionicus histrionicus) rest on rocks between dives. Moose move through the lower forest and shrubland, browsing on willow and alder. Mountain goats occupy the high alpine terrain, moving across steep slopes and rocky outcrops where few other large mammals venture.

A person traveling through the Brabazon Addition experiences rapid ecological transitions. Following the Dangerous River upstream from lower elevations, the forest canopy closes overhead with hemlock and spruce, the understory dense and dark. As the river narrows and steepens, the sound of water intensifies, and the forest opens slightly where black cottonwood and alder line the banks. Continuing upslope away from the river, the hemlock forest gradually gives way to mountain hemlock woodland, the canopy becoming more open and the understory sparser. Above the forest line, the landscape opens dramatically—the dense vegetation falls away, and the view extends across alpine tundra to the high peaks. Here, the air is thin and cold, the ground is bare rock and lichen, and the only vegetation is low-growing lupine and paintbrush. The transition from the dark, moist forest to the exposed alpine ridge is complete within a few thousand feet of elevation gain, each zone distinct in its light, moisture, temperature, and the species that inhabit it.

The Tlingit people have inhabited Southeast Alaska for thousands of years. Between the 18th and early 19th centuries, Tlingit clans expanded westward from the Alexander Archipelago, intermarrying with and eventually assimilating Eyak populations in the Yakutat region. The Ahtna Athabaskan, an interior Athabaskan group, historically used the mountain passes and river corridors to access the coast for trade and seasonal resources. These lands, referred to in Tlingit as Haa Aaní ("Our Land"), were governed by a matrilineal kinship system. Indigenous groups conducted extensive subsistence activities here, including fishing for salmon, halibut, and eulachon from streams, rivers, and coastal waters; hunting moose, Sitka black-tailed deer, and black and brown bears; and gathering berries, medicinal plants, and seaweed. The area served as a strategic hub for trade networks, with the Chilkoot Trail and White Pass—located at the northern edge of the icefield region—established as Tlingit trade routes long before the Klondike Gold Rush. Archaeological evidence and oral histories identify numerous former village sites, seasonal fish camps, and smokehouses throughout the region.

In the early 19th century, the Tlingit resisted Russian colonial expansion, notably attacking and destroying the "New Russia" settlement near Yakutat in 1805 to protect their trade routes and territory.

The Alexander Archipelago Forest Reserve, the precursor to the Tongass National Forest, was established by President Theodore Roosevelt via presidential proclamation on August 20, 1902. The Tongass National Forest was officially created by presidential proclamation on September 10, 1907, under the authority of the Organic Administration Act of 1897. On July 1, 1908, the Alexander Archipelago Forest Reserve and the Tongass National Forest were consolidated into a single administrative unit encompassing most of Southeast Alaska. Further presidential proclamations expanded the forest boundaries on February 16, 1909, June 10, 1909, and in 1925 under President Calvin Coolidge.

Under the Alaska Native Claims Settlement Act of 1971, approximately 632,000 acres of old-growth land within the Tongass were conveyed to private Alaska Native corporations. Between 2001 and 2011, during a period when the Tongass was exempt from the Roadless Rule, approximately 4,300 acres of roadless areas across the forest were entered for timber harvest. The Brabazon Addition is a 498,819-acre Inventoried Roadless Area protected under the 2001 Roadless Area Conservation Rule. These protections were removed in 2020 and reinstated in January 2023.

Vital Resources Protected

Headwater Protection and Salmon Spawning Habitat

The Brabazon Addition contains the headwaters of major river systems—including the Novatak Glacier-Yakutat Glacier complex feeding the Dangerous, Akwe, Italio, Ahrnklin, and Antlen rivers—that support five species of Pacific salmon. These high-elevation watersheds generate the cold, sediment-free water that salmon require for spawning and early development. The area's intact riparian forests of black cottonwood and mountain hemlock stabilize streambanks and maintain the shade that keeps water temperatures within the narrow range salmon need to survive. Once roads fragment these watersheds through culverts and stream crossings, the hydrological connectivity that allows juvenile salmon to move between spawning grounds and rearing habitat is severed, and the chronic erosion from road surfaces and cut slopes raises water temperatures and smothers spawning substrate with fine sediment.

Alpine and Subalpine Climate Refugia

The Brabazon Addition's five major peaks—Mount Aylesworth at 9,310 feet, Mount Armour at 8,773 feet, and Mount Jette at 8,425 feet—create an elevational gradient from sea-level riparian forest through mountain hemlock-Sitka spruce transition zones to alpine tundra and rock. This vertical structure allows species to shift their ranges upslope as climate warms, maintaining viable populations across changing conditions. The roadless condition preserves the unbroken connectivity between these elevation zones; roads would fragment this gradient, isolating alpine populations and preventing the upslope migration that species like Yukon lupine (vulnerable, IUCN) and white bog orchid (vulnerable, IUCN) depend on to track suitable climate conditions. High-elevation ecosystems recover extremely slowly from disturbance due to short growing seasons, making fragmentation here effectively permanent on ecological timescales.

Interior Forest Habitat for Old-Growth Dependent Species

The western hemlock-Sitka spruce and mountain hemlock-Sitka spruce forests of the Brabazon Addition provide interior forest conditions—dense canopy, complex structural diversity, and minimal edge effects—that support species dependent on old-growth characteristics. The Yakutat Forelands, which contains this roadless area, holds 75.5% of the remaining high-value bear habitat in the region. Sitka black-tailed deer, a primary prey species for Alexander Archipelago wolves, depend on the old-growth forest structure that provides both forage and shelter; habitat capability for this species has already declined across the Tongass due to past logging. Road construction fragments interior forest into smaller patches, creating edge effects that increase predation pressure, reduce forage quality, and expose wildlife to human hunting access—impacts that are particularly severe for species like wolves and deer that require large, continuous territories.

Intact Riparian and Wetland Transition Zones

The Sitka alder shrubland and black cottonwood riparian forests throughout the Brabazon Addition form the hydrological and ecological interface between upland forests and stream systems. These transition zones regulate water flow, filter sediment and nutrients, and provide critical habitat for species like the netted specklebelly lichen (imperiled, IUCN), which depends on the moisture and structural complexity of riparian old-growth. Road construction in these areas—whether through fill placement, drainage ditches, or stream crossings—disrupts the lateral movement of water between uplands and channels, lowering water tables in adjacent wetlands and altering the soil saturation that riparian vegetation and associated species require to persist.

Threats from Road Construction

Sedimentation and Temperature Increase in Spawning Streams

Road construction in mountainous terrain requires cutting steep slopes to create stable roadbeds; these cut slopes remain unstable for decades, continuously eroding fine sediment into streams during rainfall and snowmelt. In the Brabazon Addition's high-gradient headwater streams, this chronic sedimentation smothers the gravel and cobble spawning substrate that salmon eggs require, reducing egg survival and preventing juvenile salmon from emerging. Simultaneously, road construction removes the riparian forest canopy that shades streams; the loss of this shade causes water temperatures to rise, reducing dissolved oxygen and accelerating metabolic stress in cold-water species like salmon. The Brabazon Addition's salmon populations depend on the intact forest-stream system to maintain the cold, clear water conditions they evolved to exploit; once sedimentation and temperature increase begin, they persist for decades even after road use ceases, because the riparian forest takes 50+ years to recover sufficient shade and the streambed requires years of high flows to flush accumulated sediment.

Fragmentation of Elevational Connectivity and Isolation of Alpine Populations

Roads built through the Brabazon Addition's elevational gradient create barriers to species movement between low-elevation forests and high-elevation refugia. Species like Yukon lupine and white bog orchid, which are already vulnerable to climate change, depend on the ability to shift their ranges upslope as temperatures warm; roads and their associated cleared corridors interrupt this connectivity, trapping populations at lower elevations where conditions become unsuitable. Additionally, roads create dispersal barriers for alpine tundra species that require continuous habitat to maintain genetic connectivity across populations. The high-elevation ecosystems of the Brabazon Addition have extremely slow recovery rates due to short growing seasons and thin soils; once fragmented by roads, these alpine populations cannot recolonize isolated patches, and the loss of genetic diversity in isolated populations reduces their capacity to adapt to future climate shifts.

Habitat Fragmentation and Edge Effects in Interior Forest

Road construction fragments the continuous interior forest of the Brabazon Addition into smaller patches separated by cleared corridors. This fragmentation increases the proportion of "edge" habitat—forest adjacent to the road—where light penetration, wind exposure, and human activity create conditions unsuitable for interior forest species. For Sitka black-tailed deer and Alexander Archipelago wolves, which require large, continuous territories, fragmentation reduces the effective habitat available and increases vulnerability to hunting and predation along road corridors. The road itself becomes a dispersal corridor for invasive species and a source of chronic disturbance; the combination of habitat loss, edge effects, and increased human access makes it difficult for populations to maintain viable numbers. Because old-growth forest structure takes 200+ years to develop, the loss of interior forest habitat through fragmentation is effectively permanent on human timescales.

Hydrological Disruption of Riparian and Wetland Systems

Road construction in the Brabazon Addition's riparian zones and wetland transition areas requires fill placement and drainage ditches that alter water movement between uplands and streams. Fill material blocks lateral water flow, raising water tables upstream and lowering them downstream; drainage ditches accelerate runoff, reducing the soil saturation that riparian vegetation and wetland-dependent species require. Species like the netted specklebelly lichen, which depends on the moisture and old-growth structure of riparian forests, cannot persist in drier conditions. The hydrological disruption also affects the timing and magnitude of streamflow, reducing the high flows necessary to flush sediment from spawning gravels and maintain the cold-water conditions salmon require. Because the Brabazon Addition's hydrology is tightly coupled to its intact forest and wetland structure, roads that disrupt this coupling cause cascading effects across the entire watershed system that persist long after road construction ends.

The Brabazon Addition encompasses nearly 500,000 acres of remote mountainous terrain in the Yakutat Ranger District of Southeast Alaska's Tongass National Forest. Access is by floatplane or boat only—there are no roads into this area, and that absence of infrastructure is central to the recreation it offers. The Saint Elias Mountains dominate the landscape, with peaks including Mount Aylesworth at 9,310 feet, Mount Armour at 8,773 feet, and Mount Jette at 8,425 feet. The area transitions from Western Hemlock–Sitka Spruce forest at lower elevations through Mountain Hemlock–Sitka Spruce and Sitka Alder shrubland to alpine tundra and rock at higher elevations. No maintained trails exist within the roadless area; recreation here is backcountry in character, requiring wilderness navigation skills and self-sufficiency.

Hunting

The Brabazon Addition is a stronghold for Coastal Brown Bear, Black Bear, Moose, Mountain Goat, and Sitka Black-tailed Deer, with Grouse, Wolverine, and Wolves also present. The area falls within Alaska Game Management Unit 5, specifically Subunits 5A and 5B. Hunters access the area by floatplane or boat from Yakutat, landing at coastal fjords including Yakutat Bay and Disenchantment Bay. Youth deer hunting in the Yakutat Youth Hunt Management Area (Subunit 5A) runs October 15–31 for hunters aged 10–17 who have completed hunter education and are accompanied by a licensed resident adult. Mountain Goat hunters must complete an online identification quiz before hunting and carry proof in the field; taking nannies with kids is prohibited. Brown Bear and Black Bear regulations require that if a bear is wounded, it counts toward the bag limit for that year, and evidence of sex must remain naturally attached to the hide. Nonresident hunters pursuing brown bear or mountain goat must be accompanied by a registered guide. The roadless condition maintains habitat connectivity for large carnivores and provides the exceptional wilderness value that defines trophy hunting in this region.

Fishing

Five major river systems support sport fishing: the Akwe River, Italio River system (Old, Middle, and New Italio), Back River, Dangerous River, and Ahrnklin River. The Akwe is a 20-mile glacier-fed system holding all five Pacific salmon species—Chinook, Sockeye, Coho, Pink, and Chum—plus Steelhead, Rainbow Trout, Cutthroat Trout, Dolly Varden, and Eulachon. The New Italio is known for crystal-clear water and strong runs of Coho and Sockeye; the Middle and Old Italio support Pink and Coho salmon along with Dolly Varden, Sea-run Cutthroat, and Rainbow Trout. The Back River holds Coho, Pink, and Sockeye salmon with resident trout. The Dangerous River, draining Harlequin Lake, offers Steelhead and Dolly Varden in lower clear-water tributaries. The Ahrnklin River is productive for Coho salmon. Regulations require unbaited artificial lures or flies year-round in fresh water; bait is prohibited. Coho limit is 2 per day (16 inches or longer). Gill-netting is prohibited on the lower mile of the Akwe and Italio rivers to protect sport fishing and spawning stocks. King Salmon are often closed to sport fishing unless opened by Emergency Order. Most anglers access these rivers by air taxi from Yakutat (approximately 20 minutes flight time), with landing strips on the Middle Italio; the New Italio is inaccessible by plane due to forest cover and is reached by jet boat from the Akwe or by ATV down the old riverbed. The Italio River Cabin, located 30 air miles from Yakutat on the west bank of the Old Italio, provides base access for Coho fishing and hunting. Peak seasons are June–July for King and Sockeye, August for Pink and Chum, and late August–October for Coho, which are particularly heavy and spectacular in the New Italio and Akwe. The area is regarded as a fly fisherman's destination due to its clear water, remote nature, and lack of crowds—conditions that depend entirely on the absence of road access.

Paddling

The Brabazon Addition's glacial river systems and lakes support remote wilderness paddling expeditions, typically undertaken with packrafts or guided services. The Dangerous River is a deep, cold, glacial outflow from Harlequin Lake used for both transportation and wilderness floating. The Akwe River runs parallel to the coast and is frequently used by packrafters to bypass beach walking; its volume fluctuates dramatically with weather and glacial melt. The Italio River system includes the New, Middle, Old, and Back rivers; the New Italio is documented for gentle wilderness floats and canoe paddling from its remote mountain lake, while the Middle Italio's upper portions offer secluded canoe paddling. The Ahrnklin River is paddled as part of the historic "Lost Coast" route, floating into the Situk River system. Harlequin Lake, a 6-by-15-mile iceberg-clogged lake at the head of the Dangerous River, is a documented destination for sea kayaking among icebergs. Italio Lake serves as a starting point for float trips down the Italio River. Primary paddling occurs during June, July, and August. Crossing the mouths of the Dangerous, Italio, and Akwe rivers requires close monitoring of tide tables; crossings are safest at low tide. The Ahrnklin River is recommended to be paddled on an outgoing tide. Italio River Adventures is a documented outfitter providing guided sea kayaking on Harlequin Lake and river floats on the Italio and Akwe systems. The "Yakutat to Dry Bay Ancestral Lingit Canoe Route" is a recognized historic trade route with portions still passable between Summit Lake and the Ahrnklin River estuary. These remote float trips depend on the roadless character of the area—the absence of roads preserves the wilderness experience and the undisturbed watersheds that make multi-day paddling expeditions feasible.