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Routes
Hiking trails & Routes
United States
California
Shasta County

Eiler Lake Loop

Moderate

3.3

(1)

92

hikers

Eiler Lake Loop

03:05

10.9km

230m

Hiking

Embark on the Eiler Lake Loop, a moderate hike spanning 6.8 miles (10.9 km) with a total elevation gain of 758 feet (231 metres), typically completed in about 3 hours and 5 minutes. As you hike, you will discover varied terrain, from smooth dirt paths winding through lush forests to…

Last updated: April 23, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Thousand Lakes Wilderness

Waypoints

A

Start point

Parking

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1

4.48 km

Lake Eiler

Highlight • Lake

Lake Eiler is the largest lake in the Thousand Lake Wilderness, outstanding views of the surrounding mountains! Great place for swimming and fishing rainbow trout.

Tip by

2

6.95 km

Barrett Lake

Highlight • Lake

Sourrounded by lodgepole pine, Barrett Lake has a camping area on the northwest side, and might be a good option if you feel Lake Eiler is too crowded. The lake …

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B

10.9 km

End point

Parking

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Way Types & Surfaces

Way Types

10.9 km

Surfaces

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Elevation

Elevation

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Wednesday 6 May

20°C

5°C

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Frequently Asked Questions

What is the typical duration and difficulty of the Eiler Lake Loop?

The Eiler Lake Loop is generally considered a moderate hike. It typically takes around 2 hours and 47 minutes to complete the approximately 10.9-kilometer (6.8-mile) loop. While the hike into the lake involves an uphill climb, sections around the lake are flatter. Be prepared for some short, steep sections over loose rock.

What is the terrain like on the Eiler Lake Loop?

The terrain is quite varied. You'll encounter smooth dirt paths, rocky sections with volcanic rock formations, and areas affected by the 2014 Eiler Fire, which feature dry, burned landscapes. Other parts of the loop boast lush forests and meadows. Sturdy footwear is highly recommended due to the diverse surfaces.

What can I see along the route?

The loop offers diverse scenery. You'll pass by the largest lake in the wilderness, Lake Eiler, which has miles of shoreline. Another notable body of water is Barrett Lake, along with several unnamed ponds and meadows. Views of Freaner Peak and Mt. Lassen are also possible, and in early fall, you might spot quaking aspens.

What is the best time of year to hike the Eiler Lake Loop?

The ideal time to hike this loop is typically from August to October. This period avoids the peak mosquito season in June and July and the heavy snow season, which usually runs from November to June.

Is the Eiler Lake Loop dog-friendly?

Yes, the Eiler Lake Loop is generally dog-friendly. However, always ensure your dog is under control, and it's a good practice to keep them on a leash, especially in wilderness areas and around wildlife.

What are the parking options and trailhead access for the Eiler Lake Loop?

The loop can be accessed from trailheads like Tamarack. Be aware that access to some trailheads, particularly Tamarack, might require a 4WD vehicle due to the condition of the forest service roads.

Do I need a permit or pay an entrance fee for the Eiler Lake Loop?

The Eiler Lake Loop is located within the Thousand Lakes Wilderness, which is part of the Lassen National Forest. While there isn't typically an entrance fee for the wilderness area itself, specific permits might be required for overnight camping or campfires. Always check the latest regulations with the Lassen National Forest service before your trip.

What makes the Eiler Lake Loop's landscape unique?

The trail's landscape is unique due to its location within the Thousand Lakes Wilderness, known for its volcanic geology, similar to Lassen Volcanic National Park. You'll see evidence of the 2014 Eiler Fire, showcasing forest recovery, alongside pristine lush areas, creating a diverse and interesting environment.

Is the Eiler Lake Loop suitable for beginners?

While rated moderate, the Eiler Lake Loop involves some uphill climbs and sections with loose rock. Beginners with a reasonable level of fitness and sturdy hiking boots should be able to complete it, but those new to hiking might find it challenging in parts. Consider your fitness level before attempting the full loop.

Are there any specific considerations for hiking in the Thousand Lakes Wilderness?

When hiking in the Thousand Lakes Wilderness, be prepared for varying terrain and potential exposure in burned areas. Mosquitoes can be prevalent in early summer, so plan accordingly. Always practice Leave No Trace principles, and be aware of fire restrictions, especially during dry seasons.

Are there any specific tips for navigating the Eiler Lake Loop?

While the loop is well-defined, carrying a map or using a GPS device like komoot is advisable, especially in areas where the trail might be less distinct due to fire recovery. Pay attention to trail markers, and be prepared for changing weather conditions.

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