Redwood Sky Walk: Eureka's Old-Growth Canopy Walk

The Redwood Sky Walk is an elevated trail at Sequoia Park Zoo in Eureka, California, built through the old-growth coast redwood grove of Sequoia Park and reaching approximately 100 feet above the forest floor. Opened in June 2021 after a $4 million construction project, it is the longest arboreal walkway in the Western United States. The structure is fully accessible to wheelchairs and strollers, with a continuous accessible grade requiring no stairs for the full route. Access to the Sequoia Park Zoo itself is free and has been since the zoo's founding in 1907; the Sky Walk is ticketed separately, with current pricing available through the zoo's admissions desk.

The walk occupies a 4.5-acre old-growth redwood stand in the middle of Eureka's residential grid — a stand that survived the city's development because Sequoia Park was established as a public park in 1906, when the timber on this particular 10.8-acre parcel was not considered economically worth removing. This is, in a development that surprises no one who has observed how public green spaces are created, the principal reason old growth survives at all in most city parks. The trees did not know they were being preserved. They simply continued to grow, and the city built around them.

The Sky Walk begins at the forest floor near the zoo entrance and climbs through a series of connected switchback ramps and elevated platforms, gaining height through the redwood understory before reaching the upper canopy level at the structure's high point. The route is approximately a quarter-mile in length — shorter than most forest trails, and not a route that will fatigue anyone who has walked to a parking lot — but the vertical dimension is its purpose. At 100 feet, the view encompasses the crowns of trees that began growing during the medieval period, and the perspective on what a coast redwood actually is changes considerably from that elevation.

The platform structure is engineered to sway slightly in wind — the same deliberate flex built into suspension bridges — and passes close enough to individual redwood trunks that the bark texture and associated organisms (mosses, lichens, ferns rooted in bark fissures) are visible at arm's length. Lady Humboldt considers this proximity one of the walk's underappreciated features: the redwood canopy is typically invisible from the ground, accessible only to researchers on rope systems or to animals that live there, and the Sky Walk brings a visitor inside an ecosystem that most people have only ever looked up at.

The following table summarizes the walk's key logistical facts as reported by Sequoia Park Zoo (2025).

Feature	Detail
Location	Sequoia Park Zoo, 3414 W Street, Eureka, CA 95503
Opened	June 2021
Trail length	Approximately a quarter-mile (elevated ramp system)
Maximum height	100 feet above forest floor
Accessibility	Fully ADA-accessible; stroller-friendly; no stairs required
Zoo admission	Free (Sequoia Park Zoo has charged no general admission since 1907)
Sky Walk tickets	Ticketed separately; current pricing at zoo admissions desk
Hours	Tuesday–Sunday, 10 a.m.–5 p.m.; closed Monday and major holidays (verify seasonally)
Old-growth grove size	4.5 acres
Distinction	Longest arboreal walkway in the Western United States

The walk is a one-directional loop — visitors enter from the lower platform and exit near the same point after the full circuit. This design eliminates the congestion produced when hikers moving in opposite directions negotiate a narrow elevated platform at 80 feet, a logistical problem that Lady Humboldt notes the engineers appear to have considered. The ramp system averages an accessible 5% grade throughout; the descent return is the same route reversed. Most visits take 30 to 45 minutes at a pace that allows observation; the walk is short enough to complete before a child loses patience and long enough to give a naturalist something to think about.

The redwood grove through which the Sky Walk passes is one of the few intact old-growth coast redwood stands within any city in the world. The trees are estimated to range in age from 500 to more than 1,000 years, with diameters at breast height reaching 10 to 14 feet in the largest specimens. These are not the county's largest redwoods — Humboldt Redwoods State Park holds that distinction, in the Rockefeller Forest — but they are, as Lady Humboldt notes, fully grown old-growth redwoods located within 10 minutes of a coffee shop, a circumstance that does not exist many other places.

The grove was protected when the City of Eureka established Sequoia Park in 1906 and opened the adjacent zoo in 1907, making Sequoia Park Zoo the oldest municipal zoo in the Western United States and one of the last remaining free municipal zoos in California. The park's name references the genus Sequoia sempervirens — coast redwood — rather than the giant sequoias of the Sierra Nevada, a distinction that occasionally requires clarification for visitors arriving by way of brochures. The coast redwood and the giant sequoia are both members of the family Cupressaceae, but they have developed separate strategies for being the largest organisms in their respective ecological contexts, and these strategies produce meaningfully different trees.

Coast redwoods in this grove reach their height through persistent upward growth sustained by the marine layer. Fog drip — the condensation of maritime fog on redwood needles, which then falls to the root zone — provides a significant fraction of the tree's dry-season water intake in summer, when rain is absent but the marine layer is frequent. The Sequoia Park grove benefits from Eureka's reliably foggy summers in the same way the Rockefeller Forest does, if at a scale that fits within a city block. Lady Humboldt considers this an efficient arrangement. These facts may be related.

The canopy of an old-growth redwood is an ecosystem with distinct inhabitants, not simply the upper portions of trees that also have lower portions. At the heights reached by the Sky Walk, the bark surface supports mats of moss and liverwort that retain moisture from fog and rain, creating a substrate in which ferns and other epiphytic plants establish root systems in the bark itself rather than in any soil. Sword ferns (Polystichum munitum), more commonly associated with the forest floor, appear in bark crevices at 60 to 80 feet, rooted in accumulated organic matter that functions as canopy soil — a finding that redwood forest researchers have documented in increasing detail since the 1990s as rope access techniques allowed systematic canopy survey.

The canopy also hosts resident bird species that use different layers of the forest for different purposes. Marbled murrelets (Brachyramphus marmoratus) — a federally threatened seabird — nest in large platform branches of old-growth redwoods, flying from ocean foraging grounds to the forest canopy each day during the nesting season (May through July). The Sequoia Park grove has documented murrelet use; Lady Humboldt notes that the murrelet is the only North American bird known to nest in old-growth coastal forest and forage at sea, a commute that by any reasonable accounting is extreme, and one the bird has not chosen to explain. The Prairie Creek Redwoods section of Redwood National and State Parks contains one of the highest remaining murrelet nesting densities on the coast.

Steller's jays (Cyanocitta stelleri) move through the mid-canopy layers at Sequoia Park year-round, operating as the forest's informal announcement service. Chestnut-backed chickadees (Poecile rufescens) forage in the upper canopy branches in loose flocks through the fall and winter. From the upper platforms of the Sky Walk, these birds are visible at eye level rather than overhead — a perspective shift that, combined with the elevation and the scale of the trees, produces a reliable recalibration of the visitor's sense of where in the forest one actually stands.

Sequoia Park Zoo occupies the 10.8-acre park surrounding the old-growth grove. As one of the last free municipal zoos in California, it maintains collections of native and non-native species on a scale appropriate to a city zoo rather than a regional institution. Current animal residents include black bears, meerkats, a red panda, multiple species of North American raptors in flight mews, and a variety of waterfowl on the small pond at the park's south end. The zoo's size — modest by any measure of a larger metropolitan counterpart — reflects its origins as a Eureka civic amenity from 1907 and its operating model as a free public resource for local residents.

Lady Humboldt notes that the juxtaposition of a free city zoo and a $4 million ticketed canopy walk in a 10.8-acre park is an unusual institutional arrangement, and one that the City of Eureka has arrived at through its own logic. The combination produces a visit that contains two quite different experiences on the same grounds, which can be a convenience or a scheduling puzzle depending on what one came for. Most visitors who arrive specifically for the Sky Walk do not spend equal time at the meerkats. These facts may not be related.

The park itself — the grass areas, picnic tables, and paths through the non-elevated sections of the grove — is open to the public at all hours as a city park. The grove floor offers a ground-level view of the same trees visible from the Sky Walk above, and the contrast between the two perspectives is instructive. From below, the redwoods are columns of bark disappearing into a canopy that appears uniform and impenetrable. From 100 feet, the same canopy is a mossy, fern-populated platform that an informed eye can read as habitat rather than as ceiling. Both views are accurate; neither is complete. Lady Humboldt recommends both on the same visit, which the combined structure of the park and Sky Walk makes straightforward.

Sequoia Park is located in a residential neighborhood of Eureka at 3414 W Street, approximately 1.5 miles from the Old Town Eureka waterfront. From U.S. 101 southbound, the exit at L Street leads west into the city grid; from U.S. 101 northbound, the Henderson Street exit connects to the same grid. Street parking is available throughout the surrounding residential blocks without restriction. No dedicated visitor lot exists at the park entrance; visitors arriving by car park on W Street or on the adjacent cross streets and walk a short distance to the entrance.

The zoo and Sky Walk are open Tuesday through Sunday, 10 a.m. to 5 p.m., with the last Sky Walk admission one hour before closing. The zoo is closed Mondays and on Thanksgiving, Christmas, and New Year's Day. Current hours and any seasonal modifications are published by Sequoia Park Zoo directly; Lady Humboldt recommends confirming before planning around a specific arrival time, as zoo hours have varied slightly across seasons.

The Sky Walk's accessibility — no stairs, continuous accessible grade, width appropriate for wheelchairs and strollers — makes it one of the most broadly accessible old-growth canopy experiences in the redwood range. The alternative for canopy-level redwood viewing involves either a full-day hike (the Tall Trees permit trail in Redwood National Park) or a specialized research access that is not available to the public. The Sky Walk provides a canopy-level experience to visitors for whom those alternatives are not practical, without requiring wilderness fitness, a permit lottery, or a vehicle drive of more than 10 minutes from downtown Eureka. Lady Humboldt considers this a meaningful distinction in a county whose outdoor experiences have historically been organized around the assumption of an able-bodied and adequately equipped visitor.

Season	Conditions in the Grove	Notes for Visitors
Fall (Sep–Nov)	Clearest conditions of the year; lower marine layer frequency after October; morning light reaches the grove floor; deciduous understory in color change	Current window; optimal for canopy photography; murrelet nesting season concluded; chickadee flocks active in the upper canopy
Winter (Dec–Feb)	Rain episodes common; bark surfaces hold moisture; mosses and liverworts at peak saturation and color; foggy mornings frequent	Slowest visitation season; atmospheric for fog-season photography; no species-specific wildlife events in the canopy; grove floor trails may be muddy
Spring (Mar–May)	New growth visible in the canopy; sorrel and wood violet on the grove floor; sword fern fronds unfurling; days lengthening and warming through May	Marbled murrelet nesting begins May; the grove's understory is at peak color by April; marine layer still prevalent through May mornings
Summer (Jun–Aug)	Consistent marine layer until late morning on most days; fog drip audible and visible on calm mornings; afternoons typically clearing; canopy mosses moist through fog contribution	Peak zoo visitation season; Sky Walk crowded on weekends after 11 a.m.; early arrival recommended; marine layer on the canopy platforms creates a distinct atmospheric quality not available on clear-sky days

A visit to the Sky Walk pairs naturally with a walk through Old Town Eureka — the Victorian commercial district on the waterfront, approximately 1.5 miles from the park. The morning slot for the Sky Walk followed by lunch in Old Town is a combination that requires no logistical planning beyond knowing the zoo opens at 10 a.m. The newsletter archive includes field notes from Eureka and surrounding areas that provide orientation to the city's character for visitors planning time in the area.

The Sequoia Park Sky Walk occupies a particular position in Humboldt County's redwood landscape: it is the county's only vertical redwood experience, in the sense that every other old-growth encounter operates at ground level. The Avenue of the Giants passes through the base of Rockefeller Forest, where individual trees dwarf a standing person but the scale is horizontal — the canopy is simply out of reach. Forest bathing in the redwoods as a practice is specifically organized around ground-level immersion and the acoustic and atmospheric qualities of the forest floor. The Sky Walk inverts this entirely, placing the visitor in the canopy and the forest below.

The hike directory lists other Humboldt County trails that approach the redwood canopy experience from different angles — the Cathedral Trees Trail in Prairie Creek, the Tall Trees loop in Redwood National Park (permit required), and the Founders Grove interpretive loop at Humboldt Redwoods. None of these involve structural elevation; all of them require more time and distance than the Sky Walk. Lady Humboldt recommends the Sky Walk as an addition to, rather than a replacement for, the ground-level redwood experiences the county offers in abundance.

Is the Sequoia Park Zoo free to visit?

Sequoia Park Zoo has operated without general admission charges since its founding in 1907 — one of the few remaining free municipal zoos in California. The Redwood Sky Walk is ticketed separately; current pricing is available at the zoo's admissions desk. Visitors who enter the zoo without purchasing a Sky Walk ticket may walk the grove floor and use the park's ground-level paths at no charge.

Is the Redwood Sky Walk accessible for visitors with mobility limitations?

The Sky Walk was designed with full ADA accessibility from the outset: the route is a continuous ramp system with no stairs, an average grade within accessible standards throughout, and a width appropriate for wheelchairs and double strollers. At 100 feet of elevation, it provides a canopy-level old-growth experience to visitors for whom wilderness hiking or backcountry trails are not viable options. Lady Humboldt considers this one of the walk's most significant attributes in a county whose outdoor offerings skew heavily toward terrain that assumes wilderness capacity.

What is the best time of day to visit the Sky Walk?

Morning arrivals — particularly between opening at 10 a.m. and 11:30 a.m. — encounter the grove in its quietest state, before midday foot traffic and before the marine layer burns off entirely in summer months. In fall, morning light enters the grove laterally through the understory at an angle that illuminates the bark surfaces and canopy moss in a manner afternoon light does not reproduce. The zoo closes at 5 p.m.; Sky Walk admission closes at 4 p.m. Late afternoon arrivals in summer frequently encounter the marine layer re-forming over the canopy as onshore flow strengthens — atmospheric in a different way, and equally worth observing. The grove did not appear to prefer one over the other.

How does the Sky Walk compare to the Lost Coast Trail or Fern Canyon for a redwood experience?

The experiences operate at entirely different scales and with different demands. The Sky Walk is 30 to 45 minutes in the middle of a city, accessible without physical exertion, and organized around vertical perspective on old-growth redwoods. Fern Canyon is a canyon floor hiking experience in Prairie Creek Redwoods State Park — primarily about the five-fingered ferns and the canyon walls, with second-growth forest above rather than old-growth canopy. The Lost Coast Trail is a multi-day wilderness commitment in an entirely different category. The Sky Walk is the right choice for visitors with limited time in Eureka, for visitors with accessibility requirements, and for anyone who wants to see what a redwood grove looks like from above — a perspective that, without the Sky Walk, was previously available only to research arborists and the birds.

Lady Humboldt's weekly field guide arrives Tuesday mornings with notes from Eureka, the surrounding forests, and the full length of the North Coast — the same landscape visible, on a clear fall morning, from the Sky Walk's upper platforms. A subscription is here, and it costs nothing.