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Hiking trails & Routes
United States
California
Siskiyou County

Three Sisters Loop

Moderate

2.5

(22)

69

hikers

Three Sisters Loop

04:24

16.9km

120m

Hiking

Hike the moderate 10.5 miles (16.9 km) Three Sisters Loop in Lava Beds National Monument, featuring volcanic terrain and Skull Cave.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

Get Directions

1

37 m

Skull Cave

Highlight • Cave

Skull Cave is one of the most accessible caves in the park, with a steep staircase leading down to a year-round ice floor.

Permits to enter the Lava Beds National Monument are free and can be picked up at the visitor's center. Be sure to follow all regulations to protect this delicate ecosystem.

Tip by

2

3.40 km

Three Sisters Trail

Highlight (Segment) • Volcano

The Three Sisters are three small cinder cones in the Lava Beds Wilderness. Walk across scrubland riddled with inaccessible cave entrances to get a better view of the sisters.

Tip by

14.5 km

Public Water Fountain

Public Water Fountain

B

16.9 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

14.9 km

1.46 km

304 m

229 m

Surfaces

13.5 km

1.77 km

1.34 km

229 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,420 m)

Lowest point (1,310 m)

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Weather

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Friday 15 May

18°C

3°C

0 %

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Max wind speed: 30.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the typical distance and duration for hiking this loop?

The full Three Sisters Loop is a challenging multi-day backpacking trip, typically ranging from 46 to 50 miles (74-80 km) with around 7,000 feet (2,130 m) of cumulative elevation gain. Most hikers complete it in 3 to 5 days. The Komoot tour provided for this page, however, covers a shorter, 16.8 km (10.4 miles) section, which can be completed in a single day.

What is the terrain like on the Three Sisters Loop?

The trail offers incredibly diverse terrain. You'll hike through lush ponderosa pine forests, vibrant alpine wildflower meadows, and ancient lava flows. Expect rugged pumice fields and glossy obsidian streams, which can be tough on footwear. Sections also pass through the recovering 2012 Pole Creek Burn area. The west side features more forests and meadows, while the Wikiup Plains on the south side are exposed to the sun.

What are the best times of year to hike this trail?

The ideal time to hike the Three Sisters Loop is generally between mid-July and October. This period helps avoid significant snow cover and reduces issues with mosquitoes, which can be prevalent earlier in the season.

Are permits or entrance fees required for the Three Sisters Loop?

Yes, permits are required for overnight trips and often for day use in the Three Sisters Wilderness, especially during peak season. These can be competitive, so it's advisable to plan and reserve well in advance. Additionally, as this trail is located within Lava Beds National Monument, standard park entrance fees apply. Check the official park website for current fee schedules and specific regulations.

Is the Three Sisters Loop dog-friendly?

Dogs are generally allowed on the Three Sisters Loop and within the Three Sisters Wilderness. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers. Always pack out all pet waste.

Where can I park and access the trailheads?

Several trailheads provide access to the Three Sisters Loop, including those near the historic Dee Wright Observatory. Parking availability can vary, especially during peak season, so arriving early is recommended. Some trailheads may also have shuttle services available, particularly from nearby towns like Bend or Sisters, Oregon, to help manage parking and access.

What notable landmarks and viewpoints will I encounter?

The loop offers spectacular panoramic views of the South, Middle, and North Sister volcanoes. You'll see numerous alpine lakes like Green Lake and Moraine Lake, Skull Cave, and the Three Sisters Trail itself. Distant views of other Cascade peaks like Broken Top and Mount Jefferson are also possible. The historic Dee Wright Observatory provides expansive views of the volcanic landscape.

Does this trail intersect with other paths?

Yes, the route utilizes sections of several official trails. You will hike along parts of the Three Sisters Trail, Lyons Trail, Missing Link Trail, Bunchgrass Trail, Craig Cave Road, Caldwell Minor Trail, and Symbol Bridge Trail.

What should I pack for a multi-day hike on this loop?

For a multi-day backpacking trip, essential gear includes sturdy hiking boots (preferably broken-in), a reliable backpack, a tent, sleeping bag, cooking equipment, sufficient food, and a water filter or purification tablets. Layered clothing is crucial due to varying temperatures, and rain gear is always recommended. Don't forget navigation tools like a map, compass, and a GPS app, as well as sun protection and insect repellent.

Are there any family-friendly sections or shorter alternatives?

While the full Three Sisters Loop is a challenging multi-day trip, there are shorter, more accessible day hikes in the surrounding Three Sisters Wilderness that offer similar scenic beauty. For families or those seeking a less strenuous experience, consider exploring shorter out-and-back trails to specific lakes or viewpoints, or the 16.8 km Komoot tour provided here, which offers a taste of the area without the full commitment.

What are the regulations for hiking within Lava Beds National Monument?

When hiking within Lava Beds National Monument, it's important to stay on marked trails, pack out all trash, and respect wildlife. Collecting natural or cultural artifacts is prohibited. Specific regulations may apply to cave access, camping, and fire restrictions, so always check the official park website or visitor center for the most current guidelines before your visit.

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