Mailbox Peak Trail

The Mailbox Peak Trail is a 15.1-km out-and-back hike in Washington State, United States, gaining 1,219 m of elevation to a 1,470 m summit. Rated hard, this punishing Pacific Northwest classic rewards every step with dense old-growth forest, WTA-engineered switchbacks, and a summit mailbox overlooking Mount Rainier and the entire Middle Fork Snoqualmie Valley.

About the Mailbox Peak Trail

Mailbox Peak sits at the southern edge of the Mount Baker–Snoqualmie National Forest, rising sharply above the Middle Fork Snoqualmie River Valley in King County, Washington. The trail is managed by the Washington State Department of Natural Resources (DNR) and maintained largely by volunteer crews from the Washington Trails Association (WTA). What began as a rugged, eroded scramble up a loose mountainside has been systematically rebuilt: rock-armored switchbacks, engineered creek crossings, and elevated turnpikes have replaced the old mud trenches, creating a trail that is genuinely hard but well-maintained year-round.

The name comes from an actual mailbox bolted to a post at the 1,470 m summit. Hikers sign the register inside, leave small trinkets, and check for messages from previous visitors. The tradition gives the peak a personality entirely its own — turning a brutal 1,219 m elevation gain into something almost communal on clear weekends. On a sunny August day, the summit hosts dozens of hikers trading snacks and pointing out Rainier.

The trail offers two route options: the New Trail, a 7.6 km one-way path of well-graded switchbacks built by WTA volunteers, and the Old Trail, a steep climber’s path that gains elevation far more directly. Most hikers ascend and descend via the New Trail. Some experienced hikers make a loop combining both, though the Old Trail requires solid footing on steep, loose terrain. This guide covers the New Trail as the standard route.

North Bend, the nearest town, lies roughly 8 km north of the trailhead along Middle Fork Road — the same area where the television series Twin Peaks was filmed. For hikers combining Mailbox Peak with other Snoqualmie corridor destinations, see our guide to the best ultralight backpacks of 2026 for gear suited to the Pacific Northwest’s variable conditions.

Route Overview & Stages

The standard out-and-back route covers 15.1 km (9.4 miles) and climbs 1,219 m (4,000 ft) of elevation. The path is singular with no complex route-finding required — the only meaningful junction is the split between old and new trails on the lower mountain. The table below breaks down the key stages one-way from trailhead to summit.

Total (one way): 7.6 km | 1,219 m elevation gain | Summit elevation: 1,470 m (4,822 ft)

Highlights & Points of Interest

• DNR Trailhead (elevation 200 m): The marked starting point includes a vault toilet and a 40-space paved parking area. A DNR gate controls access — opening roughly an hour after dawn and closing an hour before dusk, with times shifting seasonally. Know the closing time before you start the climb.
• Middle Fork Creek Crossings (km 1–3): Several seasonal and permanent creek crossings cut across the lower trail. WTA volunteers have armored these with rock fords and elevated wooden turnpikes that keep boots dry in all but the highest spring snowmelt flows. Running water accompanies much of the lower climb.
• WTA-Engineered Switchbacks (km 0.3–6.5): The backbone of the New Trail is a series of carefully graded switchbacks running roughly 6.5 km up the northwest face of the peak. Drainage bars, rock armoring, and brushed corridors allow this trail to hold up under tens of thousands of visitor-days annually without becoming a mud channel.
• Old-Growth Forest Pockets (km 2–4): Scattered groves of large Douglas fir and western hemlock punctuate the climb, offering shade and a glimpse of what the Snoqualmie Valley looked like before industrial logging. These sections are quiet, mossy, and worth slowing down for.
• Old Trail Junction at 1,177 m (km 6.7): Just below the upper mountain, the New Trail rejoins the Old Trail at 3,860 ft (1,177 m). This marks the end of the switchback section and the start of the final push. Terrain shifts to loose rock and exposed ledge — trekking poles often get stowed in the pack here.
• Summit Ridge Approach (km 7.1–7.6): The final 0.9 km gains 293 m — steep enough that hands are sometimes needed on the larger rock features. Watch footing on loose basalt. The angle eases just before the summit plateau.
• Mailbox Peak Summit (1,470 m): A battered metal mailbox mounted on a post marks the top. Sign the register, leave a trinket if you like, and check the contents. The tradition is decades old and almost universally observed by hikers who reach the summit.
• Mount Rainier & Middle Fork Valley Panorama: On clear days the summit delivers an unobstructed line to Mount Rainier (4,392 m) rising above the southern horizon, the full length of the Middle Fork Snoqualmie Valley in green below, and on exceptional days the Olympic Mountains 130 km to the west.

Best Time to Hike the Mailbox Peak Trail

The Mailbox Peak Trail is technically open year-round, but conditions above 1,000 m vary dramatically by season. As of 2026, the trail sees increasingly early spring visitation as Snoqualmie corridor snowpack thins, but the upper mountain deserves serious respect outside summer regardless of air temperature.

August is the single best month to hike Mailbox Peak. Snow is reliably absent from trailhead to summit, daylight windows run from before 5:30 AM to after 9:00 PM, summit temperatures hold between 10–18°C, and the probability of a cloudless Mount Rainier view is at its annual peak. Weekend crowds are heaviest — arrive at the 40-space parking lot by 7:00 AM or earlier.

July and September are strong alternatives. July can carry residual snow above the trail junction in high-snow years; always check conditions in advance. September trades summer crowds for crisp mornings, lower traffic, and the first hints of fall color in the lower forest. Rain probability rises through October.

April through June suits experienced hikers comfortable navigating snowpack. The lower mountain typically dries out by late April, but above 1,000 m snowpack persists into June in most years. Check Washington Trails Association trip reports for real-time conditions — the WTA community posts updates weekly through shoulder season.

November through March is mountaineering terrain. Avalanche risk exists on the upper slopes, and self-arrest skills with an ice axe are mandatory above the junction in winter conditions. Micro-spikes alone are not sufficient for the summit push.

Practical Information

Accommodation

Mailbox Peak is a day-use-only trail — overnight camping is not permitted on DNR land along this route. All accommodation options are located in nearby North Bend or along the I-90 corridor.

• North Bend hotels: Several mid-range options in North Bend town center, approximately 8 km from the trailhead. Peak summer rates range from €80–€140 per night. Book well ahead for July and August weekends.
• Olallie State Park Campground: Primitive camping approximately 12 km from the trailhead via Middle Fork Road. Sites run €15–€22 per night (Discover Pass required). Vault toilets; no hookups.
• Tinkham Campground: More developed option near Snoqualmie Pass, 30 km from the trailhead. Sites €18–€25 per night via Recreation.gov reservation system. Popular with I-90 corridor hikers.
• Seattle (50 km west): Hostels from €40–€60 per night; hotels from €120–€300 per night. A practical base for hikers pairing Mailbox Peak with other Seattle-area destinations.

Getting There & Back

The Mailbox Peak Trailhead sits on Middle Fork Road, approximately 5 km east of North Bend, Washington, reached via Interstate 90 Exit 34.

• By car (recommended): From Seattle, allow 40–50 minutes (50 km). From Bellevue, 30–35 minutes. The 40-space parking lot fills by 8:00 AM on summer weekends — arrive by 7:00 AM or plan to walk additional distance from overflow areas along Middle Fork Road.
• By train + rideshare: Sound Transit’s Sounder commuter rail connects Seattle King Street Station to North Bend in approximately 45 minutes. Rideshare services cover the remaining 8 km to the trailhead, though early weekend availability is limited. Build in extra buffer time.
• Nearest airport: Seattle-Tacoma International Airport (SEA), 70 km west of the trailhead. Allow 55–65 minutes by car in off-peak traffic.

Permits & Fees

A Discover Pass is required for all vehicles parked at the Mailbox Peak Trailhead. This Washington State Recreation Pass is valid at all DNR and Washington State Parks sites.

• Annual Discover Pass: USD $30 (approximately €27)
• Day-Use Discover Pass: USD $11.50 (approximately €10.50)
• Where to buy: Online via the Washington DNR website, at outdoor retailers (REI, Cabela’s), or at self-service kiosks at major trailheads. Display the pass visibly on your dashboard.
• No backcountry permit required — Mailbox Peak is managed as a day-use trail with no overnight quota system.

Gear & Packing List

Mailbox Peak gains 1,219 m in 7.6 km one way — the gear demands of a serious mountain day hike apply here. Pack light enough to move efficiently on the rocky upper section, but not so light that afternoon weather or a slower-than-expected descent catches you short.

• Daypack (20–35L): Match pack size to your hiking style. A streamlined 20L vest like the Salomon ADV Skin 20 suits fast-and-light hikers; those preferring more structure and carry capacity should consider the Hyperlite Mountain Gear Aero 28. Hikers camping nearby the night before can leave a larger pack like the Osprey Aether 65 at the car and summit with a lighter load.
• Water (3–4 liters minimum): Creek sources exist on the lower trail but dry up above the junction. Carry a water filter and at least 2 liters from the trailhead; refill at crossings in the lower third of the hike. Above 1,177 m there is no reliable water source.
• Layering system: Summit temperatures run 10–15°C cooler than the trailhead, and the exposed ridge creates genuine wind chill. Pack a waterproof shell, a midlayer fleece, and UV sun protection. The lower forest is sheltered; the upper mountain is not.
• Trekking poles: Strongly recommended for the 7.6-km switchback descent on tired legs. Stow them in the pack for the rocky summit push — the terrain requires free hands on the steeper sections.
• Micro-spikes (seasonal): Required from November through May for safe travel above 1,000 m. Full crampons and an ice axe are needed for any winter summit attempt.
• Food and fuel: Budget 400–600 kcal per hour of hiking on the ascent. This is a 6–8 hour round trip — carry 1,800–3,000 kcal of trail food. Our guide on how many calories you need hiking a full day covers the calculation for different body weights and paces.
• Headlamp: The DNR gate closes roughly an hour before dusk. Tired legs mean descents take longer than expected — build in buffer time and carry a headlamp regardless of your planned turnaround.

Similar Trails You Might Like

Mailbox Peak’s combination of a sustained steep climb, a single dramatic summit, and well-maintained trail makes it comparable to some of the most celebrated summit hikes in the American West. If the commitment-and-reward ratio here appeals to you, these trails share the same spirit:

• Mount Whitney Trail — The highest peak in the contiguous United States at 4,421 m, with a 34-km round trip in the Sierra Nevada. The definitive American summit day hike.
• Half Dome Trail — Yosemite’s iconic granite dome with cables on the final ascent. Similar commitment level to Mailbox Peak with equally dramatic views.
• Angels Landing Trail–West Rim Trail — Zion National Park’s chain-assisted scramble: shorter than Mailbox but with remarkable canyon exposure and a genuine summit moment.
• Pacific Crest Trail — For hikers who find Mailbox Peak a satisfying warm-up and want to commit to a multi-month Pacific Northwest adventure spanning California, Oregon, and Washington.
• Continental Divide National Scenic Trail (4,988 km) — The most demanding thru-hike in the United States, following the Rockies from Mexico to Canada.

For a challenging international option with a similar earn-your-views ethos, the Theth to Valbona hike in Albania is a compelling multi-day alternative that shares Mailbox Peak’s spirit of sustained effort rewarded with mountain panoramas.

Frequently Asked Questions

When is the best time to hike the Mailbox Peak Trail?

August is the single best month: snow-free conditions from trailhead to summit, maximum daylight, and the highest probability of a clear Mount Rainier view. July through early October all offer reliable hiking. In spring (April–June), the lower mountain dries out by late April but snowpack above 1,000 m persists into June in most years — always check Washington Trails Association trip reports before heading out in shoulder season.

How difficult is the Mailbox Peak Trail?

The Washington Trails Association rates it hard. The trail gains 1,219 m of elevation over 7.6 km one way, with the final 0.9 km requiring scrambling over loose basalt at a steep grade. The difficulty is cardiovascular and sustained rather than technical — no ropes or climbing gear are needed in summer — but the relentless elevation gain makes it one of the most demanding day hikes in King County, Washington.

How long does it take to hike Mailbox Peak?

Most hikers with moderate fitness complete the 15.1-km round trip in 6–8 hours. The ascent typically takes 3.5–5 hours; the descent via the New Trail takes 2–3 hours. Add time for summit breaks and trailhead congestion. On summer weekends, plan to arrive at the parking lot by 7:00 AM to secure a spot and allow a full-day window before the DNR gate closes at dusk.

Is there camping on or near the Mailbox Peak Trail?

No overnight camping is permitted on the DNR land this trail crosses — Mailbox Peak is strictly a day-use destination. The nearest primitive camping is at Olallie State Park (12 km from the trailhead, €15–€22 per night) and Tinkham Campground near Snoqualmie Pass (30 km, €18–€25 per night via Recreation.gov). North Bend town center (8 km north) offers hotel accommodation from €80 per night in summer.

What permits do I need for the Mailbox Peak Trail?

A Washington State Discover Pass is required for all vehicles parked at the trailhead. Day passes cost USD $11.50 (approximately €10.50); annual passes cost USD $30 (approximately €27). Purchase online through the Washington DNR, at outdoor retailers like REI, or at self-service kiosks near larger trailheads. No backcountry or wilderness permit is required — Mailbox Peak is managed as a day-use trail with no overnight quota system.