Alaska has more forest than any other state, 129 million acres of it, covering everything from the mossy old growth rainforests in the Southeast to the scraggly black spruce bogs of the Interior. Learning to identify Alaska trees changes how you experience the state. What looks like a wall of green on the drive to Denali becomes a story about climate, soil, permafrost, and fire once you know what you’re looking at.
This guide covers every significant tree species in Alaska, organized by region, with identification features, where each one grows, and what it tells you about the landscape around it.
Quick Guide to Alaska Trees
My Experience with Alaska Trees
Some of my favorite memories in Alaska were hiking through on Prince of Wales Island with my old friend, Gary Muehlberger. Whatever story we were filming, whether it was mushroom foraging, deer hunting, or firewood gathering; walking amongst the giant trees of Alaska with a giant Alaskan personality, was a real treat.
Once a logger himself on the island, Gary couldn’t help himself, he would always be sharing his vast knowledge of Alaska trees and nature with me. During deer hunts or in between filming, he would quiz me on what trees were what and how to remember them. Thanks Gary, we all miss you.
Southeast Alaska Trees: The Tongass Rainforest
Southeast Alaska contains the largest temperate rainforest on earth, the Tongass National Forest, 17 million acres of old growth, glacier-carved fjords, and trees that can live for 800 years. The species here are shaped by constant rain, mild temperatures, and the deep soils of coastal Alaska.
Sitka Spruce (Picea sitchensis)
The dominant tree of the Alaska rainforest and the largest spruce species in the world. Sitka spruce can grow over 200 feet tall and live for 700 years. The largest known Sitka spruce in Alaska stands in Klawock on Prince of Wales Island — over 15 feet in diameter.
This is the tree Gary Muehlberger logged as a young man. When he’d point one out during a deer hunt, there was always a mix of professional respect and something harder to name — the complicated relationship between someone who made their living from these trees and someone who had watched the old growth disappear.
How to identify:
- Very sharp, stiff needles that will draw blood if you grab a branch wrong
- Dark green on top, two white lines on the underside
- Needles attach individually to the twig on small wooden pegs
- Cones hang downward, 2-3 inches, thin papery scales
- Bark is thin, gray-brown, flaky in irregular plates
- Massive spreading crown in open-grown trees
Where it grows: Sea level to subalpine, throughout coastal Southeast Alaska north to Prince William Sound. Requires high rainfall and cool temperatures.
Best places to see it: Tongass National Forest, Prince of Wales Island, Kodiak Island, Chugach National Forest near Seward, any coastal trail in Southeast Alaska
Fun fact: Sitka spruce wood is exceptionally strong and lightweight — it was used for WWI and WWII aircraft frames, and is still the preferred wood for acoustic guitar tops.
Western Hemlock (Tsuga heterophylla)
The most abundant tree in Southeast Alaska and the state tree of Alaska — though most people don’t know that. Western hemlock is the workhorse of the Tongass, filling in the gaps between spruce and dominating the shadier, moister sites. It’s the tree most likely to grow up through a nurse log or carpet a hillside in young forest.
How to identify:
- Soft flat needles of noticeably unequal lengths — this is the key feature
- Two white stripes on the underside of needles
- Small oval cones, less than 1 inch
- Drooping top leader — the very tip of the tree bends over like it’s nodding
- Bark reddish-brown when young, becoming deeply furrowed with age
Where it grows: Coastal Southeast Alaska, often growing alongside Sitka spruce. More shade tolerant than spruce and able to regenerate in closed forest.
Best places to see it: Any old growth trail in Southeast Alaska — Tongass National Forest, Baranof Island, Chichagof Island, Prince of Wales Island
Fun fact: Western hemlock is not related to poison hemlock — the plant that killed Socrates. Completely different family. The wood is excellent for construction and the bark was historically used by Alaska Native people for tanning hides and dyeing materials.
Mountain Hemlock (Tsuga mertensiana)
The higher-elevation cousin of western hemlock. Mountain hemlock takes over where western hemlock leaves off — pushing up into the subalpine zone where heavy snowpack, thin soils, and cold temperatures would stop most trees. At treeline it becomes gnarled and wind-sculpted, sometimes growing nearly horizontal.
How to identify:
- Needles rounder and more star-shaped in cross-section than western hemlock
- Needles arranged in all directions around the twig rather than flat
- Larger cones than western hemlock — 1-3 inches
- Same drooping top leader as western hemlock
- Often stunted and twisted at higher elevations
Where it grows: Higher elevations than western hemlock, subalpine zones of Southeast Alaska and Southcentral. Often forms pure stands near treeline.
Best places to see it: Higher trails in Southeast Alaska, Kenai Mountains, any alpine zone in Southcentral.
Alaska Yellow Cedar (Callitropsis nootkatensis)
One of the most distinctive and valuable trees in Southeast Alaska — and one of the most threatened. Yellow cedar is prized for its extremely durable, rot-resistant wood and is considered sacred by many Alaska Native peoples. The wood has a distinctive yellow tint and a sharp, spicy smell.
Yellow cedar is dying across large areas of Southeast Alaska — a phenomenon researchers attribute to climate change reducing the insulating snowpack that protects shallow roots from spring freezes. Hundreds of thousands of acres of standing dead yellow cedar are visible from the ferry in Southeast Alaska — the grey ghost forests you see on mountainsides.
How to identify:
- Drooping, weeping branch tips — more pronounced than hemlock
- Scale-like leaves rather than needles
- Distinctive sharp, spicy smell when crushed
- Yellow-tinged wood visible at cut surfaces
- Shreddy, grayish bark
Where it grows: Wetter sites in Southeast Alaska, often on poorly drained soils, rocky outcrops, and bogs. Typically at mid-elevations.
Best places to see it: Prince of Wales Island, Baranof Island, any Southeast Alaska forest with access to poorly drained sites. The standing dead ghost forests are visible from the Alaska Marine Highway ferry.
Shore Pine (Pinus contorta)
The only pine native to Alaska and a study in adaptation. Shore pine grows on the waterlogged, nutrient-poor bogs and muskegs of Southeast Alaska where almost nothing else can survive. It’s typically much smaller and more twisted than its lodgepole pine relatives, shaped by the difficult conditions it grows in.
How to identify:
- Two needles per bundle — unique among Alaska conifers
- Needles twisted, 1-3 inches long
- Small prickly cones that often remain on the tree for years
- Twisted, gnarled growth form especially in exposed locations
- Bark dark, furrowed, reddish-brown
Where it grows: Bogs, muskegs, and poorly drained coastal sites in Southeast Alaska. Often the only tree species present on waterlogged sites.
Best places to see it: Sphagnum bogs in Southeast Alaska, muskeg trails on Prince of Wales Island, coastal bog systems near Ketchikan and Sitka.
Red Alder (Alnus rubra)
The only native alder that reaches true tree size in Alaska and an ecological powerhouse. Red alder fixes nitrogen from the air into the soil, enriching sites for other species. It colonizes disturbed ground, roadsides, and landslide scars rapidly, and is often the first tree to reestablish after disturbance.
How to identify:
- Smooth gray bark with white patches
- Oval serrated leaves, dark green above, lighter below
- Small woody cones that persist through winter
- Catkins in early spring before leaves emerge
- Inner bark turns orange-red when cut — gives the tree its name
Where it grows: Moist lowland sites, streamsides, and disturbed areas in Southeast and Southcentral Alaska. Rarely above 1,000 feet elevation.
Best places to see it: Roadsides and stream banks throughout Southeast Alaska, Kenai Peninsula, any disturbed coastal forest site.
Black Cottonwood (Populus trichocarpa)
The largest deciduous tree in Alaska and one of the fastest-growing trees in North America. Black cottonwood — also called balsam poplar — dominates river floodplains and lakeshores throughout Alaska, growing up to 6 feet per year in ideal conditions. In early summer cottonwoods release clouds of cottony seeds that float on the wind like snow.
The smell of cottonwood buds in spring is one of the most distinctive smells in Alaska — resinous, sweet, slightly medicinal. If you smell something wonderful on a warm April day in Southcentral Alaska, it’s probably cottonwood.
How to identify:
- Large triangular to heart-shaped leaves, shiny dark green above, silver-white below
- Sticky, resinous buds in winter with a strong balsam smell
- Deeply furrowed grayish-brown bark on mature trees
- Smooth greenish bark on young trees
- Cottony seed masses in early summer
Where it grows: Riverbanks, floodplains, and lakeshores throughout Alaska from Southeast to Interior. Requires moist, well-drained soils and frequent disturbance to regenerate.
Best places to see it: Kenai River corridor, Susitna River floodplain, anywhere along major Interior river systems.
Interior Alaska Trees: The Boreal Forest
Interior Alaska is dominated by the boreal forest — called taiga in Russian, the word used across Siberia for the same ecosystem. It’s a relatively simple forest of a few highly adapted species that can survive -60°F winters, permafrost, and wildfire cycles that reset the landscape every few decades.
White Spruce (Picea glauca)
The most common and ecologically important tree of Interior Alaska. White spruce forms the backbone of the boreal forest, providing structure, habitat, and timber across millions of acres of Interior and Southcentral Alaska.
How to identify:
- Four-sided needles that roll easily between your fingers
- Needles have a distinctive smell — sometimes described as skunky or cat-like when crushed
- Long narrow cones, 1.5-2.5 inches
- Bark becomes gray and scaly with age
- Grows straight and tall in good conditions
Where it grows: Well-drained upland sites throughout Interior and Southcentral Alaska. Avoids waterlogged soils — that’s where black spruce takes over.
Best places to see it: Denali National Park, forests near Fairbanks, Yukon River valley, Parks Highway corridor, Kenai Peninsula uplands.
Black Spruce (Picea mariana)
The scrappy, stubborn survivor of Alaska’s coldest, wettest, most inhospitable terrain. Black spruce grows where white spruce can’t — in the frozen peat bogs and muskegs underlain by permafrost that cover vast areas of Interior Alaska. It grows slowly, looks ragged, and rarely gets tall, but it survives conditions that would kill every other tree species in Alaska.
Flying over Interior Alaska you see black spruce muskeg stretching to the horizon — a sea of scraggly dark green punctuated by frozen ponds. It looks like nothing is growing there. But those trees may be 200 years old.
How to identify:
- Short bluish-green needles, less sharp than white spruce
- Small round purple-brown cones that persist on the tree for years
- Narrow spindly crown with dead branches lower down
- Often leans at odd angles due to permafrost movement
- Usually much smaller than white spruce — often under 30 feet even when mature
Where it grows: Muskegs, peat bogs, permafrost soils, poorly drained lowlands throughout Interior Alaska. The defining tree of Alaska’s wetland boreal forest.
Best places to see it: Any low-lying area near Fairbanks, the Yukon Flats, the road to Chena Hot Springs, bog areas along the Parks Highway.
Tamarack (Larix laricina)
Alaska’s only deciduous conifer — a tree that grows needles, then drops them every fall. Tamarack looks dead in winter, which confuses people who don’t know what it is. In fall it turns brilliant gold before dropping its needles entirely. In spring the new needles emerge bright green and soft.
Tamarack grows alongside black spruce in the coldest, wettest Interior sites — one of the only trees that can handle both waterlogged soils and extreme cold.
How to identify:
- Needles in clusters of 12-20 on short woody spurs
- Needles soft and bright green in summer, brilliant gold in fall
- Completely bare in winter — looks dead
- Small upright cones, less than 1 inch
- Scaly reddish-brown bark
Where it grows: Wet bogs, muskegs, and poorly drained sites in Interior Alaska alongside black spruce.
Best places to see it: Yukon Flats, bog areas near Fairbanks, Interior Alaska wetlands. Most visible in fall when gold needles stand out against green spruce.
Paper Birch (Betula papyrifera)
The most recognizable deciduous tree in Alaska and one of the most important ecologically. Paper birch is an early colonizer after wildfire — its seeds are tiny and wind-dispersed, allowing it to establish rapidly on burned sites before spruce returns. The white bark is the result of a chemical called betulin that reflects sunlight and protects the tree from temperature extremes.
In fall birch forests turn pure gold — one of the most spectacular fall color displays in North America. The hillsides around Anchorage and the forests of Denali in late August and September are extraordinary.
How to identify:
- Bright white bark that peels in papery horizontal strips
- Dark horizontal markings called lenticels across the white bark
- Oval leaves with doubly serrated edges
- Leaves turn golden yellow in fall
- Multiple trunks often growing from the same base
Where it grows: Well-drained upland sites throughout Interior and Southcentral Alaska. Common on south-facing slopes, post-fire areas, and disturbed ground.
Best places to see it: Denali National Park, Anchorage hillside trails, Chugach State Park, Mat-Su Valley, Kenai Peninsula uplands.
Quaking Aspen (Populus tremuloides)
Named for the way its leaves tremble in even the slightest breeze — a result of the flattened petiole connecting leaf to stem. Quaking aspen groves are often one interconnected organism sharing a single root system, making them among the largest living things on earth by mass.
In Interior Alaska aspen is less common than birch but occupies similar sites — south-facing slopes, post-fire areas, and valley edges. The pale smooth bark and trembling leaves make it easy to identify once you know what to look for.
How to identify:
- Smooth pale greenish-white bark on young trees
- Round to slightly heart-shaped leaves with small regular teeth
- Leaves tremble visibly in light wind
- Flattened leaf stem — the key to the trembling
- Often grows in dense clones of genetically identical trees
Where it grows: South-facing slopes, post-fire areas, and valley edges in Interior Alaska. Less common than birch but occupies similar habitats.
Best places to see it: Denali National Park, forests around Fairbanks, Parks Highway corridor.
Kenai Birch (Betula papyrifera var. kenaica)
A smaller variant of paper birch found specifically on the Kenai Peninsula. Kenai birch is generally considered a variety of paper birch rather than a separate species but it looks and behaves somewhat differently — smaller, with darker and less white bark in many individuals. Worth knowing about if you’re spending time on the Kenai.
How to identify:
- Similar to paper birch but smaller overall
- Bark often less brilliantly white, sometimes grayish
- Leaves similar to paper birch but often smaller
- Growth habit tends to be more shrubby in poor conditions
Where it grows: Kenai Peninsula uplands and forested areas. Often growing alongside paper birch and white spruce.
Best places to see it: Kenai Peninsula forests, trails around Cooper Landing and Sterling.
Balsam Poplar (Populus balsamifera)
Balsam poplar is the Interior Alaska name for what coastal people call black cottonwood — they’re the same species or close variants depending on which botanist you ask. Either way it’s the same experience: massive fast-growing trees dominating river floodplains, sticky resinous buds that smell extraordinary in spring, and clouds of cottony seeds floating through the air in early summer like inland snow.
The smell of balsam poplar buds in April is one of the most distinctive smells in Alaska. Warm day, Southcentral Alaska, that sweet resinous balsam smell drifting through the air — it means breakup is over and summer is actually coming. Alaskans notice it every year.
How to identify:
- Large triangular to oval leaves, shiny dark green above, whitish below
- Sticky resinous buds with a strong balsam scent — distinctive even in winter
- Deeply furrowed grayish-brown bark on mature trees
- Smooth greenish bark on young trees
- Cottony white seed masses released in early summer
- Often grows in multi-stemmed clumps along rivers
Where it grows: River floodplains, lakeshores, and moist valley bottoms throughout Interior and Southcentral Alaska. One of the fastest-growing trees in Alaska — can add several feet per year in ideal conditions.
Best places to see it: Kenai River corridor, Susitna River floodplain, Yukon River communities, any major Interior river system. The cottonwood fluff in June is impossible to miss.
Fun fact: Balsam poplar buds have been used medicinally for centuries — the resinous compounds have genuine antimicrobial properties. Alaska Native people used the buds to treat skin conditions, wounds, and respiratory ailments. The smell alone feels medicinal.
Alaska Trees FAQs
White spruce and black spruce dominate Interior Alaska. Sitka spruce and western hemlock dominate Southeast. Paper birch and quaking aspen are the most common deciduous trees statewide.
Tamarack is Alaska’s only deciduous conifer — a tree with needles that drops them every fall. It looks completely dead in winter but grows new needles every spring. In fall tamarack turns brilliant gold before dropping its needles.
No significant trees grow above the Arctic Circle in Alaska. The tree line runs roughly through the Brooks Range. North of treeline is tundra — shrubby willows and alders that stay low to the ground but don’t form true trees.
White spruce, black spruce, tamarack, paper birch, quaking aspen, and balsam poplar are the main Interior species. The boreal forest is a relatively simple ecosystem compared to the more diverse coastal rainforest.
Western hemlock — though most people guess Sitka spruce. Western hemlock was designated Alaska’s state tree in 1962.
Yes — one. Shore pine (Pinus contorta) is the only pine native to Alaska. It grows in bogs and muskegs in Southeast Alaska.
The largest known tree in Alaska is a Sitka spruce on Prince of Wales Island — over 15 feet in diameter and nearly 200 feet tall.
The grey ghost forests visible on mountainsides throughout Southeast Alaska are dead yellow cedar — killed by climate-driven loss of snowpack that exposes shallow roots to spring frost. Hundreds of thousands of acres have been affected.
More Alaska Wildlife & Nature Guides
- Edible Mushrooms in Alaska — what grows beneath these trees
- Poisonous Plants & Berries in Alaska — what to avoid in the forest
- Alaska Wildflowers — what blooms in the clearings
- Hummingbirds in Alaska — the birds that depend on these forests
- Eagles in Alaska — old growth Sitka spruce is prime nesting habitat
- Black Bear vs Grizzly Bear — the animals that live in these forests
- Prince of Wales Island — home to the largest Sitka spruce in Alaska
- Boneyard Alaska — what Alaska’s landscape looked like before these trees