South Sister Climber Trail

The South Sister Climber Trail is a 12.4-mile (20 km) round-trip trail in Oregon, United States, gaining 4,878 feet (1,487 m) to the 10,358-foot (3,157 m) summit of South Sister—Oregon's third-highest volcano. Rated Class 2, it rewards determined hikers with active glaciers, a volcanic crater lake, and unobstructed views of five Cascade peaks.

About the South Sister Climber Trail

South Sister stands at 10,358 feet (3,157 m) as the highest of the Three Sisters volcanoes and Oregon's third-tallest peak. The South Sister Climber Trail #36 departs from Devils Lake Trailhead on Cascade Lakes Highway (OR-46), approximately 28 miles southwest of Bend, Oregon. At 12.4 miles round trip with 4,878 feet of elevation gain, it is one of the most accessible high-altitude summit routes in the Pacific Northwest—no ropes, no technical gear, just legs and lungs.

The route transitions through four distinct terrain zones: dense pine forest, an open grassland plateau, steep pumice flats, and a loose volcanic scree field that delivers hikers to a summit crater holding Teardrop Pool—Oregon's highest body of water at approximately 10,200 feet. On a clear day, the summit panorama spans Mount Hood, Mount Jefferson, Three-Fingered Jack, Mount Washington, North and Middle Sister, Broken Top, and Mount Bachelor. On exceptional days, Mount Shasta is visible more than 200 miles to the south.

The trail lies within the Three Sisters Wilderness, administered jointly by the Deschutes and Willamette National Forests. Group size is capped at 12 people. Dogs are welcome but must be leashed from July 15 through September 15. Planning a lighter load for the steep upper sections? Our Best Ultralight Backpacks of 2026 review covers packs purpose-built for summit assaults like this one.

Route Overview & Stages

The Climber Trail #36 is an out-and-back route starting and finishing at Devils Lake Trailhead (elevation 5,480 ft / 1,670 m). The one-way distance to the summit is 6.2 miles (10 km). Plan 7–9 hours for the full round trip, including short rest stops and time to explore the summit crater. Total elevation gain is 4,878 feet (1,487 m); the return descent is gentler on the lungs but demands careful footwork on loose scree.

Highlights & Points of Interest

• Devils Lake (5,480 ft) — The vivid teal lake at the trailhead is one of the most photographed spots on Cascade Lakes Highway. A natural start and finish line for the climb, it also has vault toilets and a campground directly adjacent to the parking area.
• Tyee Creek Crossing (~0.5 mi) — A footbridge spans Tyee Creek around the half-mile mark, providing one of the last reliable water sources on the lower route. Carry a filter or purification tablets; snow-season hikers find creek levels high and crossings fast.
• Moraine Lake (7,180 ft) — A 0.3-mile spur trail from the plateau leads to this peaceful glacial tarn set against South Sister's south face. Twenty-two designated backcountry sites make it a popular overnight base for those splitting the summit bid across two days.
• Lewis Glacier (8,830 ft) — One of South Sister's active glaciers marks the transition from steep pumice slopes to the final summit push. Snow and ice linger here well into August; microspikes are strongly advised for visits before mid-July.
• The Pumice Fields — The volcanic pumice covering the upper mountain is loose and shifts underfoot with each step. Trekking poles are not optional here—they are essential for balance on both ascent and descent.
• Summit Crater Rim (10,358 ft) — South Sister's broad volcanic crater measures approximately 0.5 miles in diameter. Walking the rim clockwise reveals continuously shifting views across the Oregon Cascades without retracing the same ground.
• Teardrop Pool (~10,200 ft) — Oregon's highest lake fills the volcanic crater with brilliant blue-green snowmelt water. The pool is typically accessible from mid-July through early October and is the trail's most striking reward.
• 360° Summit Panorama — Identifiable peaks from the true summit include Mount Hood (110 miles north), Mount Jefferson, Three-Fingered Jack, Middle Sister, North Sister, Broken Top, and Mount Bachelor. On exceptional days, Mount Shasta is visible more than 200 miles to the south.

Best Time to Hike the South Sister Climber Trail

The trail is accessible roughly from mid-June through mid-October, but conditions vary sharply by month. Thunderstorm risk above treeline is real from July through September—summit by noon and begin descending before 1:00 p.m. on summer afternoons.

June: Snow persists on the upper mountain well into mid-June. Above 8,000 feet, microspikes are required and an ice axe is advisable. The lower forest and plateau sections clear early, but the summit push involves steep icy terrain. Wilderness permits are required from May 31 onward.

July: By mid-July the route is largely snow-free, though the Lewis Glacier area often holds patches into late month. Wildflowers peak on the plateau. Weekend crowds surge—plan a 4:30–5:00 a.m. start to secure parking before the lot fills by 8:00 a.m.

August — the single best month to hike: Reliably snow-free at every elevation, stable weather windows, summit temperatures of 55–65°F (13–18°C), and the clearest Cascade views of the year. Teardrop Pool is at its fullest and most vivid. As of 2026, August remains peak season and parking pressure is highest—arrive before 6:00 a.m. on weekends or use the overflow lot 0.2 miles east on OR-46.

September: Excellent conditions through mid-month, with noticeably lighter crowds than August. Nights cool fast at elevation; overnight stays at Moraine Lake require a sleeping bag rated to at least 20°F (−7°C). Early snowfall is possible after mid-September.

October: Early snowfall can close the upper trail by mid-month. The wilderness permit requirement ends October 31. Always verify current conditions on the Deschutes National Forest trail conditions page within 48 hours of your planned start date.

Practical Information

Accommodation

Three backcountry campgrounds sit within range of the Climber Trail, all first-come, first-served with no advance reservations:

• Devils Lake Campground — 10 sites directly at the trailhead. Fee approximately $10/night (≈€9). Vault toilets and water available in season. Ideal for early-morning summit starts.
• Moraine Lake — 22 designated backcountry sites at 7,180 ft, roughly one mile off the main route via a signed spur. No fee; wilderness permit required. Historically less crowded than Green Lakes.
• Green Lakes — 28 designated backcountry sites near the Green Lakes Trailhead (an alternative approach to the summit). No fee; permit required. The most popular overnight destination in the Three Sisters Wilderness, so arrive by early afternoon to claim a site.

For car-based lodging, Bend, Oregon sits 35–40 minutes from the trailhead by car. Budget motels run $80–110/night (€74–102), mid-range hotels $130–180/night (€120–166), and vacation rentals are plentiful. Downtown Bend and the Old Mill District offer the best concentration of post-hike restaurants and gear shops.

Getting There & Back

Devils Lake Trailhead is at mile marker 91 on Cascade Lakes Scenic Byway (OR-46), 28 miles (45 km) southwest of Bend. The drive from downtown Bend takes approximately 40 minutes on paved road. No public transit serves the trailhead; a rental car is essential for visitors without their own vehicle.

The nearest commercial airport is Redmond Municipal Airport (RDM), served by Alaska, American, Delta, Southwest, and United with direct flights from Portland, Seattle, San Francisco, Los Angeles, and Denver. RDM to the trailhead is 55 miles (88 km)—about one hour by car. Portland International Airport (PDX) is 185 miles (298 km) away, roughly 3 hours driving.

Trailhead parking holds 60–70 vehicles; an overflow lot with 15 spaces sits 0.2 miles east on OR-46. On peak summer weekends the main lot fills by 7:30–8:00 a.m. An early start is not optional—it is strategic.

Permits & Fees

Two separate authorizations are required to hike the South Sister Climber Trail:

• Wilderness Permit (free): Required for all hikers from May 31 through October 31. Self-issue at the kiosk at Devils Lake Trailhead before starting. Rangers check permits on trail; the fine for hiking without one is $200. Maximum group size is 12.
• Trailhead Parking Pass: A Northwest Forest Pass ($5/day or $30/year, ≈€4.60/€27.70) or an America the Beautiful Interagency Annual Pass ($80/year, ≈€74) is required at both Devils Lake and Green Lakes Trailheads. Passes are available at Recreation.gov and at outdoor retailers in Bend including REI and locally-owned outfitters.

Gear & Packing List

The 4,878-foot elevation gain and loose scree of the upper mountain put real demands on footwear, joints, and pacing. Summit temperatures can run 20–25°F (11–14°C) below the trailhead even on warm August days, and there are no reliable water sources above Tyee Creek and the Lewis Glacier area. Carry at least 2.5 liters of water capacity. Not sure how much food to pack for a 7–9 hour effort? Our guide on how many calories you need for a full hiking day breaks down the math by weight and effort level.

Essential gear for South Sister:

• Mid-height hiking boots with ankle support — non-negotiable on loose pumice and scree
• Trekking poles — critical for balance on the steep descent through shifting volcanic sand
• Microspikes — strongly recommended before mid-July and after any early-season snowfall
• Waterproof shell jacket and insulating mid-layer — summit weather changes without warning
• Sun protection: SPF 50+ sunscreen, UV-rated sunglasses, wide-brim hat — UV intensity is elevated at altitude
• Headlamp with fresh batteries — early pre-dawn starts are common and prudent
• 2.5–3 liters water capacity; filter or purification tablets for Tyee Creek water
• High-calorie snacks: nuts, bars, and electrolyte supplements for a 9-hour effort

For pack selection, a 20–45L daypack keeps you agile on the scree without excess load. The ultralight Hyperlite Mountain Gear 2400 Windrider is purpose-built for demanding summit days where every gram counts. If you plan to spend a night at Moraine Lake, the Osprey Aether 65 carries overnight gear with comfort. The Zpacks Arc Haul Ultra 50L splits the difference—light enough for a fast day, spacious enough for overnight kit.

Similar Trails You Might Like

If South Sister has sparked an appetite for Pacific Northwest volcano summits and high-alpine scrambles, these routes offer comparable or greater challenges. The Mount Whitney Trail in California tackles the contiguous USA's highest non-technical summit at 14,505 feet—a similar Class 2 character but at significantly higher altitude. Half Dome Trail in Yosemite delivers an equally iconic summit with cable-assisted sections that add genuine exposure. For hikers ready to walk a longer trail, the Pacific Crest Trail passes directly through the Three Sisters Wilderness, connecting South Sister's volcanic neighborhood in one of America's great long-distance corridors. The Continental Divide National Scenic Trail at 4,988 km is the ultimate American wilderness challenge, while the Angels Landing Trail in Zion National Park delivers a shorter but vertigo-inducing summit experience for those who want serious exposure without a full alpine commitment.

Frequently Asked Questions

When is the best time to hike the South Sister Climber Trail?
August is the single best month. The trail is reliably snow-free at all elevations, weather patterns are stable, and Teardrop Pool in the summit crater is fully open and vivid. July and early September are strong alternatives with fewer crowds than August. Avoid the upper mountain without microspikes before mid-July or after any early-autumn snowfall.

How difficult is the South Sister Climber Trail?
The trail is rated Class 2—no technical climbing, ropes, or specialized mountaineering skills required. However, it is strenuous. The 4,878-foot elevation gain over 6.2 miles one-way, combined with loose volcanic scree on the upper half, makes this a serious full-day effort. Strong cardiovascular fitness and experience hiking at altitude are highly recommended. The knee-punishing descent on shifting pumice is where many hikers struggle most.

How far is it and how long does the South Sister hike take?
The round-trip distance is 12.4 miles (20 km) from Devils Lake Trailhead to the 10,358-foot summit and back. Fit and acclimatized hikers typically complete it in 7–9 hours including short breaks. Budget 9–10 hours if you plan to walk the full crater rim or spend time at Teardrop Pool. A 4:30–5:30 a.m. start is standard on peak-season summer days.

Where can I stay near the South Sister Climber Trail?
Devils Lake Campground (10 sites, ≈€9/night) is directly at the trailhead—ideal for a pre-dawn start. Free backcountry camping is available at Moraine Lake (22 sites) and Green Lakes (28 sites) with a wilderness permit, both excellent overnight bases for a two-day summit plan. For car-based accommodation, Bend, Oregon is 35–40 minutes away with motels from ≈€74/night and a full range of hotels and vacation rentals.

Do I need a permit to hike the South Sister Climber Trail?
Yes—two passes are required. A free wilderness permit, self-issued at the trailhead kiosk, is mandatory from May 31 through October 31; rangers enforce this on-trail with fines up to $200 for non-compliance. A Northwest Forest Pass ($5/day, ≈€4.60) or America the Beautiful Annual Pass ($80/year, ≈€74) is required to park at Devils Lake Trailhead. Both are available at Recreation.gov and at outdoor gear shops in Bend.