Upper Gray Wolf River Trail

The Upper Gray Wolf River Trail is a 19-km point-to-point route in Olympic National Park, Washington, United States, climbing approximately 1,265 m from the river valley to Gray Wolf Pass at 1,890 m. Rated moderate to difficult, it threads old-growth forest, carved river canyons, and sweeping subalpine meadows — one of the Olympic Peninsula's most rewarding wilderness walks.

About the Upper Gray Wolf River Trail

The Upper Gray Wolf River Trail cuts through the northeastern corner of Olympic National Park, one of North America's most ecologically varied protected landscapes and a UNESCO World Heritage Site. Unlike the park's famous rainforest valleys to the south and west, this northeastern corridor is considerably drier and sunnier, making it one of the more reliably accessible gateways into the Olympic high country.

The trail follows the Gray Wolf River upstream through a sequence of distinct vegetation zones. Starting in towering old-growth Douglas fir and western red cedar, the route transitions through subalpine fir and mountain hemlock before breaking above treeline onto rocky alpine terrain near Gray Wolf Pass. From the pass at 1,890 m (6,200 ft), panoramic views extend across the Dungeness Valley, the Strait of Juan de Fuca, and on clear days to Vancouver Island.

As a point-to-point route, the trail rewards hikers who commit to the full 19 km — typically spread over two to three days of backpacking. The first section crosses Buckhorn Wilderness (Olympic National Forest) before entering Olympic National Park proper, which affects permit requirements and camping rules. Backcountry camps at Three Forks, Gray Wolf Camp, Camp Ellis, and Falls Camp provide logical overnight stages. The Washington Trails Association trip reports are among the most useful real-time conditions updates for this route.

Wildlife along the corridor includes black-tailed deer, Olympic marmot, black bear, and Roosevelt elk. The Gray Wolf River supports native coastal cutthroat trout, and the upper subalpine zone hosts white-tailed ptarmigan, gray jays, and Clark's nutcrackers.

Route Overview & Stages

The route begins at Slab Camp Trailhead at approximately 747 m (2,450 ft) and ends at Gray Wolf Pass at 1,890 m (6,200 ft). The opening kilometres involve a net descent to the river valley before the trail climbs steadily all the way to the pass — a profile that front-loads effort and reserves the most dramatic scenery for the final stage.

Stage 1 opens with a sharp 300-m descent from the trailhead through Buckhorn Wilderness to Camp Tony at 442 m, a river-level clearing flanked by old-growth Douglas fir. A footbridge at approximately 4.7 km marks the transition to the river's east bank. The trail then climbs through mixed conifer forest past Slide Camp, where a natural scree field at 704 m breaks the canopy and opens the first unobstructed skyward view. At 9.2 km the route crosses into Olympic National Park. The path descends once more to Three Forks Camp at 625 m — the trail's lowest point on this upper section and the natural end of a long, varied first day.

Stage 2 is the gentlest stretch. From Three Forks the valley narrows and the trail stays close to the Gray Wolf River, crossing small tributaries on log bridges and moving through increasingly open forest. Camp Ellis at 899 m offers two distinct riverside camping areas and is the last flat, sheltered overnight option before the terrain steepens significantly.

Stage 3 is where the trail earns its moderate-to-difficult rating. From Camp Ellis the gradient sharpens immediately. Falls Camp — two small sites near a cascading waterfall at approximately 1,400 m — marks the halfway point of the final push. Above 1,600 m, tree cover gives way to open talus slopes and broad subalpine meadows thick with lupine, Indian paintbrush, and heather in summer. The final 2 km to Gray Wolf Pass at 1,890 m requires careful footing on loose rock, with compacted snowfields possible before mid-July.

Highlights & Points of Interest

• Camp Tony — A river-level clearing at 442 m, historically used as a base camp by early Olympic Peninsula explorers. The surrounding old-growth Douglas fir canopy contains some of the largest-diameter trees on the entire route.
• Slide Camp — Situated at 704 m beside a natural scree field, this site offers a striking break in the otherwise dense forest corridor. Raptors ride thermals above the open slope during most afternoon hours.
• Buckhorn Wilderness Boundary — The transition from Olympic National Forest into Olympic National Park at around 9.2 km marks a visible shift in forest character. Tree density and understory complexity increase noticeably beyond this invisible line.
• Three Forks Camp — Named for the meeting of three stream channels at 625 m, this popular basecamp is one of the few sites on the trail with a pit toilet and level ground suitable for larger tents.
• Cedar Lake — A 3.2-km out-and-back side trail from near Camp Ellis leads to Cedar Lake at 1,622 m, a high alpine tarn ringed by subalpine fir. Reflections on calm mornings are exceptional and well worth the extra distance.
• Camp Ellis — At 899 m on the upper Gray Wolf River, this established backcountry site provides two camping areas and reliable water access. It is the last comfortable overnight stop before the final climb. Bear canisters are mandatory here.
• Falls Camp — Two exposed tent sites at approximately 1,400 m serve as a high camp for parties targeting an early morning crossing of Gray Wolf Pass. Snow lingers at this elevation into late June most years.
• Gray Wolf Pass — The trail's culmination at 1,890 m delivers sweeping views across the Dungeness drainage, the Olympic interior, and on clear days the Strait of Juan de Fuca and Vancouver Island. Beyond the pass, the route drops into the Dosewallips drainage, opening options for experienced multi-day loop traverses.

Best Time to Hike the Upper Gray Wolf River Trail

The trail is accessible roughly from early July through October, depending on annual snowpack. As of 2026, check current conditions with the Olympic National Park Wilderness Information Center in Port Angeles before departure — heavy snow years can push the pass opening into mid-July.

• July — Gray Wolf Pass usually clears by mid-month. Wildflowers begin on lower slopes. Snowfields above 1,500 m may still require microspikes, and the Gray Wolf River runs high from snowmelt, making log crossings more demanding than later in the season.
• August — Peak season and the single best month to hike the Upper Gray Wolf River Trail. Snow is largely gone from the pass, subalpine meadow wildflowers peak with lupine and Indian paintbrush, temperatures sit between 10–22°C, and long daylight hours (sunset after 8 pm) give ample time on trail.
• September — Solitude returns after Labor Day. Huckleberries ripen along the lower trail, and fall colour begins in the vine maple and huckleberry scrub of the upper valley. Morning frost is common above 1,500 m. Weather windows are generally stable in the first half of the month.
• October — Early snow is possible above 1,500 m by mid-month, and Pacific storms arrive more frequently. Fall colour in the river corridor is vivid. Suitable for experienced hikers prepared for winter conditions at elevation.
• November–June — The pass stays snow-covered and the upper route is not recommended for standard backpacking. The basin attracts ski tourers and winter mountaineers with full avalanche safety equipment.

Practical Information

Accommodation

There are no huts, lodges, or commercial facilities anywhere on the Upper Gray Wolf River Trail. All overnight stays rely on designated wilderness campsites operated by the National Park Service or the U.S. Forest Service.

• Three Forks Camp (625 m) — Multiple tent pads, pit toilet, inside the Olympic National Park boundary. Popular in August; reserve through Recreation.gov well in advance.
• Gray Wolf Camp (~720 m) — Smaller site between Three Forks and Camp Ellis. No toilet; pack-out waste required.
• Camp Ellis (899 m) — Two separated riverside camping areas. Bear canisters mandatory. No toilet facilities.
• Falls Camp (~1,400 m) — Two small, exposed sites near a cascade below the pass. No facilities. Best used as a launch point for an early morning summit of Gray Wolf Pass.

Wilderness Permit camping fees inside Olympic National Park are approximately $8–15 USD per person per night (around €7–14). No permit fee applies for camping in the Buckhorn Wilderness section of the trail.

The nearest town is Sequim, Washington (~45 minutes by car), with motels and B&Bs for a pre- or post-hike night. Port Angeles, about 60 minutes from the trailhead, is the main service hub for Olympic National Park and offers a wider accommodation range.

Getting There & Back

The Slab Camp Trailhead is accessed via Palo Alto Road in Clallam County. There is no public transport to the trailhead — a private vehicle or arranged shuttle is required.

• From Seattle by car: Drive north on I-5 to Edmonds, take the Washington State Ferries crossing to Kingston (~30-minute crossing), then head west on US-101 to Sequim and follow forest roads. Allow 3.5–4 hours total including the ferry. The Hood Canal Bridge route via US-104 avoids the ferry but adds approximately 30 minutes.
• Nearest major airport: Seattle-Tacoma International Airport (SEA), approximately 4 hours by road. Port Angeles has a small regional airport (CLM) with limited charter connections.
• Point-to-point logistics: Most parties hike out-and-back or arrange a vehicle shuttle between Slab Camp Trailhead and an exit on the Dosewallips side. Shuttle services are offered by outfitters in Sequim and Port Angeles.
• Parking fee: A Northwest Forest Pass or America the Beautiful Pass is required at the Slab Camp Trailhead. Day use without a pass costs $5 USD.

Permits & Fees

A Wilderness Permit is required for all overnight camping inside Olympic National Park boundaries. Permits are bookable online via Recreation.gov or available in person at the Olympic National Park Wilderness Information Center in Port Angeles (open daily, late May through September). Day hikers require no permit for any section of the trail.

Park entry costs $30 USD per vehicle for a 7-day pass. The America the Beautiful Interagency Annual Pass ($80 USD / ~€74) covers entry to all federal recreation lands and represents good value for multi-park itineraries. For current permit availability and wilderness regulations, refer to the Olympic National Park Upper Gray Wolf River trail page.

Gear & Packing List

The Upper Gray Wolf River Trail is a remote multi-day route with no infrastructure beyond the trail corridor itself. The nearest road is many kilometres from any point on the path, and conditions at elevation change quickly even in August.

Backpack: You need capacity for 2–3 nights of gear, food, and a mandatory bear canister. For a well-supported load on technical terrain, the Osprey Aether 65 handles heavy packs comfortably over long days. Ultralight hikers should consider the Zpacks Arc Haul Ultra 50L (pack weight ~510 g) or the Hyperlite Mountain Gear 3400 Windrider, which excels in the wet, variable conditions typical of the Olympic Peninsula. See our Best Ultralight Backpacks 2026 round-up for a detailed comparison of sub-1 kg options.

Bear canister: Mandatory inside Olympic National Park — hanging food is prohibited. The BV500 or Bear Vault BV450 both fit inside a 50–65 L pack and meet NPS requirements.

Water treatment: The Gray Wolf River and all side streams carry Giardia risk. Carry a filter (Sawyer Squeeze or BeFree-style) with at least 1.5–2 L capacity per person.

Navigation: The NPS requires hikers to carry map and compass. Download the Green Trails Olympic National Park No. 136 topo or the NPS-issued trail map before departure. GPS is a useful supplement but cairns above treeline may be buried in snow before mid-July.

Layering system: Temperatures at Gray Wolf Pass drop near freezing overnight even in August. Pack a down or synthetic insulating layer, a waterproof hardshell, and merino base layers. For calculating daily calorie needs on a demanding multi-day route, see our guide on how many calories you need hiking a full day.

Emergency kit: Headlamp with spare batteries, fire-starting kit, emergency bivy, comprehensive first-aid kit, and a personal locator beacon or satellite communicator. Cell service is entirely absent on the trail.

Similar Trails You Might Like

If the Upper Gray Wolf River Trail appeals — a multi-day wilderness push through ancient forest to a high alpine pass — these routes offer comparable rewards. The North Kaibab Trail in Grand Canyon National Park shares a dramatic elevation profile and river-canyon character, while the South Kaibab Trail delivers a shorter, more exposed alternative on the canyon's south rim. For high-altitude ridge walking with Sierra Nevada views, the Clouds Rest Trail in Yosemite is outstanding. The Panorama Trail covers exceptional subalpine terrain in a single day, and Hidden Canyon at Zion rewards those seeking technical canyon exploration. Hikers drawn to dramatic point-to-point alpine crossings on other continents will find much to compare in the Theth to Valbona hike in Albania.

Frequently Asked Questions

What is the best time of year to hike the Upper Gray Wolf River Trail?
August is the optimal month. Snow has cleared from Gray Wolf Pass, subalpine wildflowers peak between 1,500 m and the pass, and weather is most stable with long daylight hours. July is possible once the pass opens (usually mid-month), but expect residual snowfields above 1,500 m and high river levels. September offers solitude and fall colour but requires readiness for overnight frost at elevation.

How difficult is the Upper Gray Wolf River Trail?
The National Park Service rates it moderate to difficult. Stage 1 involves a significant initial descent followed by sustained climbing with a full pack — there is no easy warm-up. Stage 3 from Camp Ellis to Gray Wolf Pass gains 530 m in just over 6 km, with sections of talus and open alpine terrain. Hikers should be comfortable on uneven ground with a loaded pack and capable of basic route-finding above treeline.

How many kilometres should I plan per day?
Most parties cover ~12 km on Day 1 to Three Forks, then ~5 km on Day 2 to Camp Ellis with the afternoon free for the Cedar Lake side trip, then a full ~12 km summit day on Day 3. Strong hikers can compress the route into two days, but that leaves little time for the scenery. Out-and-back parties should budget an additional day for the descent.

What camping options are available on the trail?
Four designated wilderness camps serve the route: Three Forks Camp (pit toilet, inside Olympic National Park, permit required), Gray Wolf Camp (no facilities), Camp Ellis (two riverside areas, bear canister mandatory), and Falls Camp (two small exposed sites near the pass). Hanging food is prohibited throughout the national park — a bear canister is mandatory, not optional. Permits are bookable via Recreation.gov.

Do I need a permit to hike the Upper Gray Wolf River Trail?
Day hikers require no permit for any section. Overnight camping inside Olympic National Park boundaries requires a Wilderness Permit at $8–15 USD per person per night. The Buckhorn Wilderness section at the trail's start (National Forest land) has no camping permit requirement. Park entry is $30 USD per vehicle for 7 days; the America the Beautiful Annual Pass ($80 USD) covers all federal lands for a full year.