What to look for in nature in Alaska this April

How much daylight does Alaska gain in April?

• Earth Day

  Thursday, April 22, 2027 · Anywhere you can step outside

  Earth Day falls on April 22 every year, and in 2027 it lands on a Thursday, right in the middle of the migration. EARTHDAY.ORG says the first one was held on April 22, 1970. A short walk with a notebook and a pair of binoculars is a fine way to mark it in a state where the birds are only just arriving.

When do geese, swans and cranes return to Alaska?

• Canada geese, the first waterfowl

  Canada goose arrival has averaged about April 9 over four recent years, per the refuge biologist · Creamer’s Field, Fairbanks

  White-cheeked Canada geese are traditionally the first migratory waterfowl to show up in the Interior, Ross told the News-Miner. He also told Alaska’s News Source in 2025 that the last 50 years of refuge records show waterfowl arriving earlier: an average date of about April 16 in the mid-1970s, and up to about April 7 now. In 2023, a cold April, the first goose was logged on April 15.

• Trumpeter swans

  Usually around April 11 or 12; more than 100 on the fields by the end of the month, per the refuge biologist · Creamer’s Field, the Chena River and open water around Fairbanks

  Swans trickle in as small family groups, and Ross said the refuge may hold 100 or more by the end of April. In 2023 the first swan arrived on April 14. In a cold year, look at the open water along the Chena River as well as the fields.

• Sandhill cranes

  Fairbanks: late April (first crane April 24 in 2023); breeding grounds: early to mid-May, per ADF&G · Fields and wetlands around Fairbanks, then tundra and muskeg

  ADF&G reports that cranes reach their nesting grounds in early to mid-May, so April sightings are birds passing through or arriving at the earliest edge. Cranes are wary birds, and the department notes that their dancing display peaks in late winter and early spring.

• Snow buntings on their way out

  Usually gone by mid-April; the last one was logged April 27 in the cold spring of 2023 · Open fields and roadsides in the Interior

  These small white-and-rusty songbirds arrive in late March and move on to nest in the mountains and on tundra. The News-Miner’s 2023 migration recap noted that the spring was unusually cold, and that the cold kept buntings and even gray-crowned rosy finches in the valley longer than usual.

• The first songbirds and the second wave of ducks

  Expected through April, per the refuge biologist; about 100 more species follow in May · Creamer’s Field and other Interior wetlands

  Ross listed rough-legged hawks, northern pintails, herring gulls, Lapland longspurs, American tree sparrows, ruby-crowned kinglets, yellow-rumped (myrtle) warblers, green-winged teal, varied thrushes and violet-green swallows among the birds due in April. A ruby-crowned kinglet was the first migratory songbird heard at the refuge in 2025.

• Potter Marsh, Anchorage

  From late April through September, per ADF&G · Seward Highway south of Anchorage; 1,550-foot boardwalk

  ADF&G’s viewing guide lists Canada geese, northern pintails, canvasbacks, red-necked phalaropes, grebes and northern harriers using the marsh from late April, with gulls, Arctic terns and shorebirds from May. Eagles nest in the cottonwoods near the base of the bluff.

• Spring Migration Celebration

  Annual, in late April; the 2026 event was Saturday, April 25; the 2027 date was not posted when we looked · Creamer’s Field, Fairbanks

  Friends of Creamer’s Field hosts a free celebration with local outdoor groups, nature walks and activities, timed to the arrival of the birds. Check its site for the 2027 date, because the organizers pick the day close to the event.

• Spring bird banding

  Spring banding runs over a few weeks in May; check with the institute · Creamer’s Field

  The Alaska Songbird Institute runs the northernmost bird banding station in North America, on the refuge. The News-Miner’s 2023 recap reported 22 days of spring banding that year, ending June 2, and volunteers are welcome.

Where can I watch eagles, sea lions and the hooligan run in April?

• Stikine River Birding Festival

  April 21 to 25, 2027, per Travel Wrangell · Wrangell and the Stikine River delta

  Travel Wrangell says admission is free, lists field trips, speakers and workshops, and describes the delta as one of the biggest staging areas on the Pacific Flyway. It suggests binoculars, layers, rain gear and boots for the tide flats, and asks birders to keep their distance from nesting and feeding birds.

• Eagles gathering for the hooligan

  Eagles begin arriving in early February; the organizers’ page lists a peak count of 1,600 · Wrangell and the Stikine delta

  The organizer’s page says eagles settle all over town waiting for the hooligan to start up the river in April. Timing follows the fish, not the calendar.

• Steller sea lions waiting offshore

  April, with the run · Islands north of Wrangell

  Sea lions congregate on the islands north of town to wait for the same fish. They are best watched from a boat tour or from shore with a spotting scope, never approached.

• Sandhill cranes overhead

  Around mid-April, in flocks of hundreds or even thousands, according to the festival’s 2024 organizer · Wrangell and the delta

  The organizer told KSTK radio in 2024 that cranes always arrive right about mid-April and use the delta as a stopover. Travel Wrangell’s birding guide calls the delta the main staging ground and also names Mallard Slough as a spot for migration.

• Hooligan, or eulachon, spawning runs

  Main spawning migration as early as April in Southeast; generally May in Southcentral and Western Alaska, per ADF&G · Rivers from the Stikine to the Twentymile near Turnagain Arm

  ADF&G says the date a run returns to a given stream varies a lot from year to year. At the Twentymile River, ADF&G’s run-timing guide for the Anchorage area lists hooligan from April through May, with a saltwater dip-net window of April 1 to May 31 and a freshwater window of April 1 to June 15, for Alaska residents only. That guide was printed in 2022, so read the current regulations summary before going.

• Rufous hummingbirds

  Often the first week of April in Southeast, reported as early as March 31 in Juneau · Ketchikan, Sitka, Juneau and other Southeast towns

  Journey North recorded a first rufous hummingbird in Ketchikan on April 1, 2001 and in Juneau by April 8 that year, and Bob Armstrong’s Nature Alaska notes males reaching Juneau by April 1 in 2015. These are only two sources, so treat the dates as a rough guide; Journey North takes sighting reports.

Which whales pass Alaska in April, and where can I see them?

• Gray whales at Kodiak

  Late February to May along the coast, with the entry into the Bering Sea mostly in April and May, per ADF&G · Kodiak Island, then Unimak Pass and Bristol Bay

  ADF&G’s Kodiak viewing guide says almost the entire eastern Pacific population passes the island each spring, and that the whales can be seen from shore or from a boat, sometimes by the thousands. The 2024 festival calendar sent whale-watching hikes to Narrow Cape, near the Pasagshak State Recreation Area.

• Whale Fest Kodiak

  Annual, in April; the 2027 dates were not found · Kodiak

  ADF&G describes the festival as Kodiak’s celebration of the whales’ spring migration. The 2024 calendar ran from April 5 to April 27, with Audubon whale-watching hikes on two Saturdays, a marine mammal stranding talk, and a science symposium. Check whalefestkodiak.com for the 2027 schedule.

• Bowhead whales off Utqiagvik

  April through May, per NOAA Fisheries stock assessment · Leads in the sea ice off Alaska’s north coast

  The assessment says the Western Arctic bowheads migrate through the Chukchi and Beaufort seas in April and May, following cracks between the shorefast ice and the moving pack to Point Barrow. A NOAA Marine Fisheries Review article describes ice-based counts there each spring from April 15 to May 30, beginning in 1976. NOAA Fisheries puts the population at about 15,229, from surveys in 2019.

• Subsistence whaling is under way

  Spring, along the north coast · Utqiagvik and other whaling communities

  The Alaska Eskimo Whaling Commission manages the Alaska Native subsistence hunt under an agreement with NOAA. Visitors should stay off the ice and away from whaling camps unless invited.

When do wood frogs start calling in Alaska, and when does the birch sap run?

• Wood frogs calling

  April and May in Anchorage; late April around Fairbanks in at least one year · Ponds, meltwater pools and wetlands statewide, north to the Brooks Range

  The wood frog is the only amphibian in most of Alaska. The National Park Service says it emerges just after the snow melts and the air warms, and that its calling follows snowpack and temperature. Alaska Science Forum reported male wood frogs singing at a University of Alaska Fairbanks pond in late April 2016, and the Anchorage Daily News said in 2026 that wood frogs sing, mate and lay eggs in local ponds every April and May. They freeze solid over winter.

• The birch sap run

  Around mid-April, per UAF Cooperative Extension; later in a cold spring · Birch trees across the Interior and Southcentral

  The extension’s tapping guide says sap begins to run when days warm and the ground thaws, and that daytime highs consistently above 50 °F mean it will run soon. OneTree Alaska adds up the degrees by which each day’s high exceeds 32 °F; sap usually starts by 225 degrees, and a “sap watch” goes out at 175. In the cold April of 2023 the count was still only 85 on April 17.

• Green-up still ahead

  Fairbanks long-term average May 8 · Birch and aspen on Chena Ridge and elsewhere

  In UAF’s 2023 report, climate specialist Rick Thoman gave May 8 as the long-term average for green-up, defined as the day birch and aspen leaves give the canopy “a faint but distinct green flush.” April is therefore the last bare month.

• Pasqueflower buds

  Blooms mostly in May · South-facing slopes and dry gravel

  The pasqueflower is among the first wildflowers, but both Georgeson Botanical Garden and Wrangell-St. Elias National Park say it blooms in May, so April is for watching the fuzzy buds push up through the old grass.

What are caribou and moose doing in April?

• Caribou herds start north

  Satellite-collar studies define spring migration as April 16 to May 31 for the Teshekpuk and Central Arctic herds · North Slope and Brooks Range

  The North Slope Borough’s collar maps label April 16 to May 31 as the spring migration period. ADF&G says small bulls and non-pregnant cows drop their antlers in April, while pregnant cows keep theirs until calves arrive in late May or early June.

• Moose in the last of the snow

  April · River bottoms, willow flats and roadsides

  Moose may still be wading through snow in April. ADF&G says cows chase off the previous year’s calf just before giving birth in spring, so a young moose near a cow in April is probably last year’s calf.

What opens or begins in Alaska nature in April?

• Denali Park Road opens to Mile 30

  Usually late April; April 30 in 2022, April 24 in 2024, April 25 in 2025 · Denali National Park and Preserve

  Once the plowing crews finish, the National Park Service opens the road to private vehicles as far as the Teklanika Rest Area at Mile 30. In its releases the park warns of snow, ice and mud in shaded stretches, and says the road may open and close several times. It stays open, weather permitting, until May 19; buses begin on May 20. The park announces the day, so check before driving up.

• Fire season and burn permits

  April 1 each year · Alaska, state, municipal and private land without a local program

  The Division of Forestry’s 2025 announcement said the wildland fire season was underway on April 1, with burn permits required statewide, and that southern and southwest regions had begun early on March 17 that year. Permits are free; campfires under 3 feet across with flames under 2 feet tall need none.

• Flood Preparedness Week

  Proclaimed each spring by the governor; April 12 to 18 in 2026; the 2027 week was not announced · Statewide

  The proclamation asks Alaskans to learn about flood risk and plan ahead. Watch for a 2027 announcement.

• Spring subsistence bird harvest

  The season usually opens April 2; the 2026 season ran April 2 to August 31, and the 2027 rules were not out · Eligible communities in each region

  The U.S. Fish and Wildlife Service regulations for the spring and summer subsistence harvest cover only eligible residents in listed regions, with different open seasons by region. Other people should not hunt migratory birds during this period.

What is April weather like in Alaska, and what is breakup?

• River breakup starts

  Spring, varying by river and year · Tanana, Yukon, Kuskokwim and others

  The Alaska-Pacific River Forecast Center publishes breakup outlooks each spring. In 2026 its forecaster Kyle Van Peursem told Alaska’s News Source that a breakup stretched across about six weeks is the preferred outcome, while a rapid thaw makes ice jams more likely.

• Late snow and avalanche danger

  April, mostly in the mountains · Chugach, Kenai, Alaska Range and Southeast peaks

  Valdez still averages 22.3 inches of snow in April, and avalanche centers keep publishing forecasts through spring. Read the advisory first.

When is the last spring freeze in Alaska?

What is in the sky over Alaska in April 2027?

• The Pink Moon

  Full at 2:27 p.m. AKDT on Tuesday, April 20; the best evening is April 20 · Rises in the east well after sunset: about 10:32 p.m. in Anchorage

  Moonrise comes late in Alaska this month, so the Moon is low in the east well after sunset. It also looks full for about three nights, so the evenings on either side work too.

• The Lyrids, a poor year

  The shower is predicted to peak at about 5:41 p.m. AKDT on Thursday, April 22 (01:41 UT on April 23); Sea and Sky lists the peak nights as April 22 and 23 · North and east of Lyra, after dark

  With the Moon nearly full and rising late, the meteors will be few. In Anchorage the Moon rises at about 1:55 a.m. on the 22nd. Expect only a few per hour at best.

• The Moon beside Jupiter and Mars

  Moon near Jupiter on the evenings of April 14 and 15 (about 68 percent lit); Mars about 3 degrees from the Moon on April 15 · South and southwest after dark

  Jupiter, in the Leo and Cancer region, stays in the evening sky through spring; Mars is dimming. The Moon's separations from both planets are our own calculations.

• The thin morning crescent and Venus

  Mornings of April 3 and 4 · Low in the east before sunrise

  By our calculation, a crescent Moon about 9 percent lit passes within about 3 degrees of Venus.

• Northern lights

  Any clear, dark night; storms tend to cluster near the equinoxes · Best in the Interior and Arctic

  No agency issues a seasonal aurora forecast; the Geophysical Institute in Fairbanks posts a daily outlook. The long light of May washes the lights out until mid to late August.

What can families do outdoors in Alaska this April?

Safety notes for April in Alaska