Gray Whales, Elk, and Salmon: Humboldt County Wildlife in May

May in Humboldt County is the month when several wildlife phenomena occupy the same calendar without coordinating with each other. The gray whale migration's northbound leg is winding down; the Roosevelt elk are approaching calving season; spring Chinook have entered the Klamath and Trinity river systems; shorebird migration over Humboldt Bay is at or just past its peak; rhododendrons along the Newton B. Drury Scenic Parkway have reached a state of considerable consequence; and the Eta Aquariid meteor shower arrives in the pre-dawn hours of early May, as is its custom.

Lady Humboldt notes that the county's position at roughly 40–41°N on the Pacific coast places it at a genuine ecological crossroads: the southern margin of the temperate rain forest, the heart of the Klamath mountain region's salmon watersheds, and a substantial section of the Pacific Flyway. What moves through here in May has been doing so for reasons accumulated over millennia. The tourist calendar was not consulted.

What follows is a phenological guide to May in Humboldt County — the timing, the locations, and the observational details that the brochures tend to omit.

The Pacific gray whale's northbound migration runs from approximately late February through May, with the bulk of the population — roughly 19,000 to 21,000 animals (NOAA Fisheries, 2024) — passing California waters in March and early April. By the first week of May, the animals still moving north are typically late-season migrants: mothers with calves, which travel more slowly and hug the coastline more closely than the adults that preceded them, and older individuals whose condition delayed their departure from the winter lagoons of Baja California.

From Trinidad Head — the 368-foot volcanic promontory at the northern edge of Trinidad Bay — late-season sightings remain possible through mid-May in active years. Cow-calf pairs in particular tend to remain within one to two miles of the coast, keeping to the inner edge of the kelp line. Lady Humboldt recommends arriving before 10 a.m., when wind chop has not yet developed, and scanning systematically from north to south. A gray whale's blow — the characteristic columnar exhalation, typically reaching 10 to 15 feet — is visible at up to half a mile on a calm morning.

The eastern North Pacific stock was removed from the Endangered Species List in 1994, in a development that surprises no one who has spent a May morning on the Trinidad Head trail and counted three blows before the coffee went cold. Patrick's Point State Park also provides elevated coastal viewing from Wedding Rock and Agate Beach, both of which offer unobstructed sightlines to the northbound corridor.

Humboldt County holds one of the largest concentrations of Roosevelt elk (Cervus canadensis roosevelti) remaining in California, with the Prairie Creek Redwoods State Park herd — approximately 150 individuals — among the most continuously monitored ungulate populations on the Pacific coast. May is a particular observational window: bulls are in full velvet, their antlers growing at up to an inch per day during the peak growth phase, and cows are in the final weeks before calving season, which begins in earnest in June.

The Gold Bluffs Beach area — accessible via Davison Road off U.S. 101, approximately 8 miles north of Orick — produces the most reliable daytime sightings. The meadow systems backing the dunes provide consistent grazing access, and the herd commonly moves between the old-growth forest interior and the dune margins throughout the day. The elk at Gold Bluffs Beach have, over some years of uninterrupted coexistence with vehicles on Davison Road, declined to find them interesting. This is useful for the observer who does not wish to approach on foot.

For those who prefer to watch from a distance on foot, the Elk Prairie campground meadow in Prairie Creek Redwoods provides a reliable dawn-and-dusk viewing location. California State Parks rangers recommend maintaining a minimum distance of 50 yards from individual elk — a guideline of genuine consequence in late May, when cows approaching their calving date have become, as is their custom, considerably less patient with the general public.

The spring Chinook salmon run enters the Klamath and Trinity river systems beginning in late March and continues through June, with the Trinity's run typically trailing the Klamath's main-stem arrival by several weeks. Spring Chinook are the largest Chinook returning to these rivers by individual body weight; fish of 30 to 50 pounds are not unusual, and fish exceeding 60 pounds have been recorded in the Trinity system. The California Department of Fish and Wildlife (CDFW) maintains a counting station on the Trinity and issues periodic run reports throughout the season.

In recent years, spring Chinook returns to the Trinity have ranged from approximately 3,000 to 12,000 adults, reflecting ocean conditions, hatchery contributions from the Trinity River Hatchery at Lewiston, and ongoing habitat restoration work downstream from Lewiston Dam. Lady Humboldt notes that the Hoopa Valley Tribal Fisheries conducts independent run monitoring on the lower Trinity — a dataset that extends further back in time than most state records and which receives less attention than its completeness merits.

Shore-based observation of holding fish is possible at several points along the Highway 299 corridor. Pear Tree Bar near Junction City and the South Fork Trinity confluence near Willow Creek both provide river access where fish can be observed in clear water pausing in deep pools before their continued upstream passage. Early mornings, before afternoon silt reaches the lower pools, offer the clearest viewing conditions. The hike directory includes several Trinity River access points with river-level approaches.

The Humboldt Bay National Wildlife Refuge and the surrounding bay complex serve as a critical stopover point on the Pacific Flyway for shorebirds and waterfowl moving northward in May. Western sandpipers and dunlin dominate the count during peak shorebird migration in late April and early May — flocks of 10,000 to 50,000 individuals have been recorded at the Hookton Slough unit of the refuge during peak concentration events (Humboldt Birding Trails, Pacific Flyway Council data).

By the second week of May, the shorebird peak has typically passed and the composition shifts toward breeding residents and late-season arrivals. Osprey have returned to their Humboldt Bay nesting sites by mid-April and are in active incubation through May. Barn swallows, Vaux's swifts, and olive-sided flycatchers arrive in May and begin working the county's riparian corridors. Vagrant species — birds displaced from their usual Pacific routes by spring weather systems — continue to appear through the month and are not taking questions about how they arrived.

Lady Humboldt suspects that the number of skilled observers who have stood at the Eureka waterfront in early May and watched a Laysan albatross pass in direct morning light is lower than it ought to be, given the evidence from eBird records. The Humboldt Bay Birding Trail, maintained cooperatively by the refuge and the local Audubon chapter, provides access to the primary shorebird and waterfowl areas. Optimal shorebird viewing occurs approximately two hours before high tide, when birds concentrate as the exposed flats diminish.

Humboldt County's May wildflower calendar is dominated by the Pacific rhododendron, whose bloom timing varies by elevation and aspect but whose most accessible display runs along the Newton B. Drury Scenic Parkway through Prairie Creek Redwoods — mature specimens reaching 20 feet in height, positioned along the road margin with the unhurried confidence of plants that have been doing this longer than the road has existed. Lady Humboldt considers the peak bloom window along Drury Parkway to be of genuine distinction; it is worth planning for, and worth not missing by arriving a week late.

Species	Peak Bloom Window	Location Notes
Pacific rhododendron (Rhododendron macrophyllum)	Late April – mid-May	Redwood understory; Newton B. Drury Scenic Pkwy, Prairie Creek
California iris (Iris douglasiana)	April – early June	Coastal prairie; Patrick's Point, Centerville Beach, Manila Dunes
Hooker's fairy bells (Prosartes hookeri)	May	Old-growth forest understory; Prairie Creek, Redwood National Park
Blue-eyed grass (Sisyrinchium bellum)	April – June	Coastal meadows and roadsides; common throughout the county
Western columbine (Aquilegia formosa)	May – July	Stream banks and forest openings; particularly Fern Canyon area
Henderson's shooting star (Primula hendersonii)	April – May	Moist coastal bluffs; Bear Harbor area, Sinkyone Wilderness

Bloom timing is sensitive to the preceding winter and spring precipitation. A wet April extends the rhododendron season; a dry, warm April compresses it to roughly 10 days. The California Phenology Network maintains monitoring records from several county stations, and the Redwood National and State Parks visitor center in Orick typically posts current bloom status during peak season.

May brings the Eta Aquariid meteor shower, which peaks annually around May 5–6 and remains active through approximately May 20. The shower is produced by Earth passing through the debris stream left by Halley's Comet — particles enter the atmosphere at roughly 66 kilometers per second, producing fast meteors with persistent trains. Under dark skies with the radiant high, an observer can expect 30 to 40 meteors per hour at peak. The Eta Aquariid radiant rises in the southeast; productive observation does not begin before approximately 3 a.m., making the pre-dawn hours of May 5–7 the primary window.

Humboldt County's best dark sky access lies at the southern end of the county within the King Range National Conservation Area — the Lost Coast — where the combination of coastal mountains, sparse settlement, and minimal highway lighting produces conditions below Bortle Class 3 on the light pollution scale. The ridgelines above Shelter Cove measure among the darkest accessible sites in Northern California. The Avenue of the Giants corridor through the redwoods provides an alternative with considerably less driving, though the tall canopy limits the visible sky arc to those willing to locate a suitable meadow clearing.

Lady Humboldt notes that coastal fog — which is, in the matter of May reliability, rather more dependable than the Eta Aquariids themselves — frequently covers the coastal strip after midnight. The 72-hour marine layer forecast warrants checking before committing to the drive to Shelter Cove. These two facts may be related.

For those planning around specific sightings, the following table covers the primary May wildlife windows, locations, and timing across the county. Lady Humboldt recommends cross-referencing with the events calendar for any ranger-led programs, which are typically timed to peak activity windows and carry local knowledge not available from a table.

Species or Phenomenon	Status in May	Best Location	Best Time
Gray whale (northbound)	Late-season; cow-calf pairs	Trinidad Head, Patrick's Point	Morning, low wind
Roosevelt elk	Bulls in velvet; cows pre-calving	Gold Bluffs Beach, Elk Prairie	Dawn and dusk
Spring Chinook salmon	Active run in Klamath and Trinity	Pear Tree Bar (Hwy 299); Willow Creek	Clear-water mornings
Shorebird migration	Early May peak; tapering mid-month	Humboldt Bay NWR, Hookton Slough	Two hours before high tide
Pacific rhododendron	Peak bloom (late April – mid-May)	Newton B. Drury Scenic Pkwy	Midday for full color
Eta Aquariid meteors	Peak May 5–6; active to May 20	King Range / Shelter Cove ridgeline	3–5 a.m., clear nights only

Are gray whales still passing Humboldt County in May?

Late-season gray whales — primarily mothers with calves — continue the northbound passage along the Humboldt coast through mid-May. Cow-calf pairs travel more slowly and remain closer to shore than the adults that preceded them, which often makes for more sustained viewing. Trinidad Head is the primary observation point; Patrick's Point offers a secondary position with slightly lower elevation and better shelter from northwest wind.

When do Roosevelt elk calves arrive in Humboldt County?

Roosevelt elk calves in Prairie Creek Redwoods are typically born between early June and late July, with peak births in mid-June. May cows are in the final weeks of gestation and are considerably more alert to observers than at other times of year. The recommended 50-yard minimum distance applies at all seasons; in late May, the spirit of the recommendation merits as much attention as the letter.

Where can the Eta Aquariid meteor shower be seen in Humboldt County?

The King Range National Conservation Area — particularly the ridgelines above Shelter Cove — offers the darkest accessible skies in the county and is the recommended location for the Eta Aquariid peak (May 5–6). The marine layer is a significant variable; a favorable 72-hour forecast is worth confirming before the drive. The Avenue of the Giants corridor provides an alternative for those willing to locate a meadow clearing within the redwoods.

Is it possible to observe spring Chinook salmon from shore on the Trinity River?

Several public access points along the Highway 299 corridor allow shore-based observation. Pear Tree Bar near Junction City and the South Fork Trinity confluence near Willow Creek both provide river positions where holding fish are visible in clear water, particularly in the early morning before afternoon silt reaches the lower pools.

Lady Humboldt's weekly field guide arrives Tuesday mornings, with tide tables, upcoming events, and whatever else the county has seen fit to present in the prior seven days. A subscription is here — it arrives free of charge and requires no password.