O'Neil Pass Trail

The O'Neil Pass Trail is a 12 km point-to-point route in Olympic National Park, Washington, United States, gaining 591 m of elevation across temperate rainforest, subalpine meadow, and high alpine terrain. Rated moderate to strenuous, it links the East Fork Quinault River valley to the Duckabush River Trail via O'Neil Pass — one of the most remote high crossings in the Olympic Mountains.

About the O'Neil Pass Trail

Deep in the southeastern corner of Olympic National Park, the O'Neil Pass Trail cuts through some of the least-visited backcountry in the contiguous United States. Managed by the U.S. National Park Service, the trail follows a logical corridor between two major river systems — the East Fork Quinault and the Duckabush — that explorers have traversed since the 1890 O'Neil Expedition, the first systematic crossing of the Olympic interior.

The route traverses three distinct ecosystems in 12 km. It opens in lowland old-growth forest dominated by towering Sitka spruce and western red cedar, many with diameters exceeding 3 metres. The trail then climbs through montane forest before breaking into open subalpine meadows carpeted with red heather, blue lupine, and Indian paintbrush. The pass itself, at approximately 1,340 m (4,400 feet), offers sweeping views of the Bailey Range and the glaciated summit of Mount Olympus on clear days. The descent on the eastern side drops into the upper Duckabush drainage, a narrower, shadier corridor through metamorphic bedrock.

As part of the Regional Walking Network (RWN), the O'Neil Pass Trail is a significant connector rather than a simple out-and-back. Most multi-day hikers incorporate it into longer loops that also include Anderson Pass or LaCrosse Pass. The trail demands genuine self-sufficiency: no facilities, no bridges over every creek, and campfires prohibited above 3,500 feet (1,067 m). Stock animals are not permitted on this trail. Navigation skills matter — the upper meadow sections carry minimal cairn marking and no mobile signal whatsoever.

If remote valley-to-valley crossings appeal to you, the Theth to Valbona hike in Albania shares the same character: steep passes, wild terrain, and the satisfaction of crossing from one drainage into another on foot.

Route Overview & Stages

The trail runs 12 km from the East Fork Quinault River Trail junction to the Duckabush River Trail, with O'Neil Pass as the high point at approximately 1,340 m. Total elevation gain is 591 m (1,940 feet), concentrated in the first two-thirds of the route. The descent to the Duckabush side is considerably gentler, losing roughly 150 m over the final 3 km. The trail is one-way as described; a car shuttle between the Quinault and Duckabush trailheads is required for a point-to-point traverse.

Highlights & Points of Interest

• East Fork Quinault Old-Growth Forest — The opening kilometres pass through one of North America's last intact temperate rainforest corridors. Sitka spruce and western red cedar reach 3 m in diameter; the understory is blanketed in sword fern and wood sorrel. Annual rainfall here exceeds 3,500 mm, producing moss-draped trunks and near-permanent mist.
• White Creek Basin — A shaded wilderness camp at roughly 4.5 km, set in a forested draw where multiple small streams converge. Water is reliable throughout summer (treat before drinking). The camp is well sheltered from the prevailing southwesterly winds that buffet the higher terrain above.
• Subalpine Meadow Transition Zone — Above 900 m the canopy opens into broad meadows dominated by red heather (Phyllodoce empetriformis), blue lupine, and Indian paintbrush. The transition is most vivid from late July through mid-August, when wildflower density rivals any meadow in the Pacific Northwest.
• O'Neil Pass (approx. 1,340 m / 4,400 ft) — The high point of the route, named after Lieutenant Joseph P. O'Neil of the 1890 U.S. Army expedition that first mapped this crossing. On cloudless days the pass commands views west to the glaciated summit of Mount Olympus (2,432 m) and east toward the Brothers massif and Hood Canal.
• Marmot Lake — A shallow alpine tarn set in a glacially carved cirque just east of the pass. The lake is habitat for the Olympic marmot (Marmota olympus), a species found nowhere else on Earth. Burrow systems are visible on the rocky slopes immediately above the shoreline; maintain a 30 m distance from all wildlife.
• Duckabush Upper Drainage — The final descent follows the headwaters of the Duckabush River through a narrowing valley of metamorphic schist and phyllite. The river here runs clear and cold year-round, and the sound of rushing water accompanies the last kilometre to the junction with the Duckabush River Trail.
• Olympic Marmot Habitat — Between White Creek Basin and the pass, rocky talus fields above treeline host the densest populations of Olympic marmots on the southeastern approach. Listen for their sharp alarm whistles in mid-morning when they are most active above the burrows.
• Historic O'Neil Expedition Corridor — The 1890 O'Neil Expedition used this precise corridor to make the first documented crossing of the Olympic interior, carrying out scientific specimens that helped establish the case for a national park. Interpretive panels along the lower Quinault section reference key expedition campsites and discoveries.

Best Time to Hike the O'Neil Pass Trail

The O'Neil Pass Trail is reliably accessible from late July through mid-October. Snow lingers on the upper sections — above 1,000 m — well into July, and the pass itself can remain snow-covered until early August in heavy-snow years. An ice axe and micro-spikes are recommended for crossings before August 1.

Late July: Snowmelt is usually complete by the final week of July on the main trail, but north-facing slopes near the pass may hold soft névé. Wildflowers are just reaching peak bloom. Creek crossings can still be swift from snowmelt; hike before noon for the lowest water levels. Mosquitoes near White Creek Basin can be intense — carry head nets.

August: The single best month to hike the O'Neil Pass Trail. Snow-free conditions across all elevations, peak wildflower display in the subalpine meadows, lower creek crossings, and maximum daylight hours combine to make this the optimal window. As of 2026, the NPS maintains the late-July through October open season for backcountry permits; check the park's current wilderness trail conditions page before departing, as storm damage can close sections unexpectedly.

September: An excellent alternative. Crowds thin sharply after Labor Day weekend, huckleberry and blueberry bushes ripen along the meadow margins, and the first autumn tones appear in vine maple. Weather remains generally stable through mid-September before the first significant autumn storms arrive. A full rain kit is mandatory from this month onward.

Early October: Possible in clear-weather years but carries real risk. A single overnight snowstorm can close the pass and render the upper trail unnavigable without winter equipment. Only hikers with avalanche-awareness training, map and compass skills, and a full winter sleep system should attempt the pass after late September.

May–June: Avoid. The Graves Creek access road may be gated or washed out, and the pass can hold 2–3 m of consolidated snow even when low-elevation trails are clear. Call the Quinault Ranger District at (360) 565-3131 before any spring attempt.

Practical Information

Accommodation

The O'Neil Pass Trail has two designated wilderness camps: White Creek Basin (approximately 4.5 km from the Quinault junction) and Marmot Lake (east of O'Neil Pass, approximately 10.5 km). Both sites offer cleared tent pads but no shelters, bear boxes, or toilet facilities. Human waste must be buried at least 15 cm deep and 60 m from water sources, trails, and camp. Campfires are prohibited above 3,500 feet (1,067 m) — carry a stove.

The nearest front-country lodging is in the Quinault area, roughly 20–25 km west of the trailhead via the South Shore Road. The historic Lake Quinault Lodge (operated by Aramark under NPS concession) charges from approximately €125–€175 per night for a standard room in peak summer season. The nearest campground to the Quinault trailhead approach is Graves Creek Campground, priced at approximately €18–€22 per night for a basic site with bear boxes.

On the Duckabush side, indoor options are limited; the closest town with motel accommodation is Hoodsport, Washington, approximately 35 km south on US-101. Most hikers arrange a vehicle shuttle and base themselves at one site for the full trip.

Getting There & Back

The nearest major airport is Seattle-Tacoma International Airport (SEA), approximately 165 km east of the Quinault trailhead. Drive time ranges from 2 hours 30 minutes to 3 hours depending on traffic through Olympia or via the Bremerton ferry crossing. No scheduled public transport reaches the trailhead area; a rental car or private shuttle is essential.

From Seattle, take I-5 south to US-101, then follow US-101 west around Hood Canal and north to the Quinault turn-off near Amanda Park. Take the South Shore Road east to the Graves Creek area. The final section of road beyond Graves Creek Campground is unpaved and may require a high-clearance vehicle in wet conditions.

Because the route is point-to-point, a car shuttle is required between the Quinault South Shore Road trailhead and the Duckabush River trailhead (off US-101 north of Hoodsport). Driving distance between the two trailheads is approximately 120 km (about 1 hour 50 minutes). Private shuttle services are available through outfitters based in Port Angeles and Olympia — book at least one week in advance during July and August.

Permits & Fees

All overnight hikers must hold a Wilderness Permit from Olympic National Park. Permits for the O'Neil corridor can be reserved in advance through recreation.gov (a small reservation fee applies) or obtained in person at the Quinault Ranger Station on a first-come, first-served basis. Quota limits apply to White Creek Basin and Marmot Lake camps during peak season (late July through August); advance booking is strongly recommended if starting in August.

Park entry requires an America the Beautiful Annual Pass (approximately $80 USD) or a 7-day vehicle permit ($35 USD). Bear canisters are strongly recommended and may be made mandatory in the O'Neil corridor in future seasons; they can be rented at the Olympic National Park Visitor Center in Port Angeles for a modest daily fee. Day hikers do not need a wilderness permit but must pay the park entry fee.

Gear & Packing List

The O'Neil Pass Trail spans rainforest, montane forest, and exposed alpine terrain over 12 km. Kit selection must account for all three zones plus the Olympic Peninsula's notorious precipitation (over 3,000 mm annually at lower elevations).

• Backpack (45–65 L): A 2–3 night carry with a bear canister, full food supply, and wet-weather layers needs at least 45 L. The Osprey Aether 65 carries heavy loads comfortably on the steep Quinault ascent. For those prioritising low base weight, the Hyperlite Mountain Gear 3400 Windrider handles Olympic backcountry conditions in an ultralight package. A balanced mid-weight option is the Deuter Aircontact Lite 45+10, which offers excellent back ventilation on the exposed upper sections.
• Waterproof shell jacket and trousers: Non-negotiable on the Olympic Peninsula. Expect rain at any elevation in any month. A 3-layer hardshell rated to at least 20,000 mm hydrostatic head is the minimum.
• Insulating mid-layer: Temperatures at O'Neil Pass drop below 5°C on August nights. A synthetic or down jacket — the latter stored in a waterproof stuff sack — provides essential warmth at camp.
• Waterproof hiking boots with ankle support: The rainforest section is muddy throughout summer; the rocky approach to the pass requires stable ankle support. Gaiters keep debris clear of footwear on the upper scree margin.
• Navigation tools: Green Trails waterproof map #166 (Mount Christie) and a baseplate compass. Mobile phone signal is absent across the entire route. The upper meadow carries minimal cairn marking.
• Water treatment: A filter or chemical purification is mandatory — all water sources carry Giardia risk. Multiple reliable streams are present, particularly near White Creek Basin and on the descent to Marmot Lake.
• Bear canister: Required for all food, garbage, and scented items 24 hours a day in the backcountry. The BearVault BV500 holds approximately 3 days of food for one person.
• Calorie planning: The steep ascent between White Creek and the pass burns significantly more calories than flat-trail hiking. Our guide on how many calories you need hiking a full day covers energy needs for demanding backcountry days in detail. For ultralight gear options that reduce carry weight without sacrificing capability, see our best ultralight backpacks 2026 round-up.

Similar Trails You Might Like

If the O'Neil Pass Trail's combination of deep forest, a wild alpine crossing, and genuine remoteness appeals to you, these United States wilderness routes share a similar spirit. Each rewards hikers with high-country views, significant elevation change, and a sense of arriving somewhere genuinely off the beaten track.

• South Kaibab Trail (Grand Canyon, Arizona) — A steep, exposed ridge descent through the geological layers of the Inner Gorge, with unobstructed canyon views throughout.
• North Kaibab Trail (Grand Canyon, Arizona) — The longer, shadier North Rim counterpart to the South Kaibab, passing through multiple ecological zones from forested rim to desert river.
• Hidden Canyon (Zion National Park, Utah) — A dramatic canyon scramble with narrows, fossil-studded walls, and exposed chain-assisted sections above the canyon floor.
• Clouds Rest Trail (Yosemite National Park, California) — A high-ridgeline route offering one of Yosemite's finest panoramas, including close views of Half Dome and the Clark Range.
• Panorama Trail (Yosemite National Park, California) — A looping subalpine route past Glacier Point with waterfalls, granite domes, and sweeping Sierra Nevada high-country views.

Frequently Asked Questions

What is the best time to hike the O'Neil Pass Trail?
August is the single best month. Snow has typically cleared from all elevations by early August, wildflowers are at peak bloom in the subalpine meadows, and creek crossings are at their seasonal lowest. Late July works if you're prepared for soft snow near the pass. September is an excellent quieter alternative, though weather becomes less predictable from mid-month onward as the first Pacific autumn storms move in.

How difficult is the O'Neil Pass Trail?
The trail is rated moderate to strenuous by the National Park Service. The 591 m (1,940 feet) of elevation gain is distributed unevenly, with the most demanding climbing concentrated between White Creek Basin and O'Neil Pass. Fit hikers with multi-day backpacking experience will manage well. The remoteness, uneven creek crossings, minimal waymarking above treeline, and absence of mobile coverage make this unsuitable for beginners without strong navigation skills and wilderness first-aid knowledge.

How many kilometres per day should I plan?
A two-night itinerary is the most comfortable pacing. Day 1: hike 4.5 km to White Creek Basin (allow 3–4 hours with a loaded pack). Day 2: cross O'Neil Pass and camp at Marmot Lake (3–4 hours, 7.5 km with a significant climb). Day 3: descend 3 km to the Duckabush River Trail junction (1.5–2 hours). This pacing leaves time to explore the pass area and Marmot Lake without rushing either climb.

Is there accommodation or huts along the trail?
There are no huts, shelters, or staffed facilities anywhere on the O'Neil Pass Trail. Two designated wilderness camps — White Creek Basin and Marmot Lake — provide cleared tent pads but no other infrastructure. Hikers must carry all food in a bear canister, pack out all waste, and manage water treatment independently. The nearest front-country campground with facilities is Graves Creek, approximately 20 km from the Quinault trailhead access point.

Do I need a permit to hike the O'Neil Pass Trail?
Yes, for any overnight stay. A Wilderness Permit from Olympic National Park is required for all backcountry camping. Permits can be reserved at recreation.gov or obtained in person at the Quinault Ranger Station. Park entry also requires either a 7-day vehicle pass ($35 USD) or an America the Beautiful Annual Pass ($80 USD). Day hikers do not need a wilderness permit but must pay the park entry fee. During peak August season, advance permit reservations are strongly advised as both camp sites operate at quota.