Broken Top and Green Lakes Loop: A 3-Day Backpacking Adventure Through Oregon's Central Cascades

Broken Top is one of the most visually arresting peaks in the Oregon Cascades — a brutally eroded stratovolcano that looks like a summit someone detonated from within, its ancient crater open to the sky and its flanks streaked with glacial remnants and rust-colored volcanic rock. The Green Lakes that pool at its base are an impossible shade of aquamarine, fed by glacial runoff and framed by wildflower meadows that peak in mid-July. Together they form the centerpiece of one of the most rewarding 3-day loops in the Three Sisters Wilderness.

This route sees heavy traffic on weekends — it's close to Bend and the trailheads are well-advertised — but a mid-week start or an early summer window before the crowds materialize rewards you with solitude that's hard to find this close to central Oregon's population centers.

Permits and Regulations

The Three Sisters Wilderness requires a free self-issue wilderness permit at the trailhead for overnight travel. The Green Lakes Trailhead operates under a timed-entry permit system during peak season (typically late June through Labor Day) — check with Deschutes National Forest or Recreation.gov for current requirements before you go, as reservation windows open weeks in advance. No campfires are permitted in most of the wilderness above 5,000 feet. A camp stove is non-negotiable.

The Route: 3 Days, ~22 Miles

Day 1: Green Lakes Trailhead to Green Lakes Basin (~5.5 miles, 1,000' gain)

Start at the Green Lakes Trailhead off Cascade Lakes Scenic Highway (Highway 46), about 28 miles southwest of Bend. The trail follows Fall Creek through old-growth pine and fir, gaining elevation gradually before the basin opens up and the landscape transforms into volcanic tundra. Camp at one of the designated sites around the lower Green Lake — sites are first-come, first-served, and fill by early afternoon on summer weekends. Set up early, then spend the afternoon exploring the upper lake basin and the moraines below Broken Top's east face.

Day 2: Green Lakes to Soda Creek via Crater (6.5–8 miles, 1,500' gain / 2,000' loss)

The second day is the highlight of the loop — a high traverse around Broken Top's southern flank that takes you up to a saddle near the crater rim before descending toward the Crater Ditch junction and down into the Soda Creek drainage. This section is off-trail for portions of the crater traverse; navigation skills and a downloaded topo on your GPS are essential. The views into Broken Top's crater and back toward South Sister across the Green Lakes basin are extraordinary. Camp along Soda Creek in the forest below — sites are more dispersed and less crowded than the Green Lakes basin.

Day 3: Soda Creek to Trailhead via Broken Top Trail (~8 miles, 800' gain / 600' loss)

The return follows the Broken Top Trail north and east, looping back toward the trailhead through varied terrain — open ridgelines with views of the Three Sisters, lodgepole forests recovering from past wildfire, and the Deschutes River headwaters drainage. It's a long but relatively gentle day that ends back at the Green Lakes Trailhead.

Best Time to Go

Late July through mid-September is the sweet spot. Snow can linger on the Broken Top traverse and in the upper basin well into July — check the Northwest Weather and Avalanche Center and call the Bend-Fort Rock Ranger District for current conditions before committing to the crater traverse section. By August, the route is typically snow-free and the wildflowers in the Green Lakes basin are at peak. September brings solitude, stable weather, and the possibility of an early dusting of snow on the summit — dramatic and manageable if you're prepared.

Water

Water is abundant on this route: Fall Creek, Green Lakes, Soda Creek, and several unnamed seasonal streams along the traverse. Filter everything — cattle graze in the lower elevations of the wilderness, and the high use of the Green Lakes basin means contamination risk is real. A Sawyer Squeeze or BeFree filter handles the volume efficiently. Carry 2 liters minimum on the traverse day when you're highest and sources are least predictable.

Wildlife

Black bears are common in the Three Sisters Wilderness. Hang food and scented items using a PCT hang or carry a bear canister — a canister is easier in this terrain. Pika colonies inhabit the rocky moraine fields around Broken Top's base; Clark's nutcrackers are ubiquitous in the krummholz. Marmots are entertaining company at the Green Lakes basin camps. Mountain goats occasionally appear on Broken Top's upper cliffs.

Gear Considerations

Footwear: The crater traverse section involves talus, loose volcanic scree, and potentially snow. Trail runners work for experienced scramblers; lightweight hiking boots with ankle support are the safer call.
Navigation: Download the route on OnX or Gaia GPS. The off-trail crater section requires map reading — don't rely on cairns in poor visibility.
Wind and weather: The exposed ridge sections above 7,000 feet see significant afternoon wind and are subject to rapid storm development. Start early each day, particularly on the traverse section.
Sunscreen: High elevation plus volcanic rock reflection creates brutal UV exposure on clear days. Treat it like a ski day.

The Broken Top and Green Lakes loop earns its popularity honestly. The volcanic drama, the improbable colors of the lakes, and the breadth of the Cascade panorama from the high traverse make it one of the best 3-day wilderness experiences in Oregon. Go mid-week, go in August, and bring a camera that can do justice to what you'll find up there.