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United States
California
Mono County

Obsidian Dome Trail

Easy

4.8

(4406)

12,123

hikers

Obsidian Dome Trail

00:25

1.55km

20m

Hiking

Hike the easy Obsidian Dome Trail for a unique journey through a volcanic landscape with glittering obsidian and High Sierra views.

Last updated: February 26, 2026

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1

709 m

Obsidian Dome access trail

Highlight • Trail

Volcanic activity is very intense in the nearby Mammoth Lakes region. Obsidian Dome is the natural site that illustrates it perfectly. Discover these volcanic phenomena by taking this path.

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1.55 km

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Way Types & Surfaces

Way Types

1.50 km

< 100 m

Surfaces

1.45 km

< 100 m

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Elevation

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Today

Monday 18 May

11°C

-6°C

0 %

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Max wind speed: 15.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the difficulty level of the Obsidian Dome Trail?

The Obsidian Dome Trail is generally considered easy to moderate, suitable for various fitness levels. The main path to the summit is often described as an easy grade, while a longer loop around the dome can be more moderately challenging due to distance and elevation gain. The komoot route is rated as easy.

How long does it typically take to hike the Obsidian Dome Trail?

The duration depends on the chosen route. A common out-and-back hike of about 3.9 km (2.4 miles) with 90 m (295 ft) of elevation gain typically takes around 1 hour and 6 minutes. Shorter paths to the top can be completed in less time, while a longer loop of about 6.3 miles could take several hours. The komoot route is approximately 1.5 km and takes about 25 minutes.

Where can I park and access the Obsidian Dome Trail?

The trailhead is accessed via a gravel road. There are parking spots available, but be aware that the road can be rough, especially beyond the first parking area. A high-clearance vehicle may be advisable, and careful driving is recommended. Winter closures affect road access to the area.

Do I need a permit or pay an entrance fee for the Obsidian Dome Trail?

No, there are typically no permits or entrance fees required to hike the Obsidian Dome Trail itself, as it is located within the Inyo National Forest. However, always check current regulations before your visit, especially for any specific activities or overnight stays in the wider forest area.

What is the terrain like on the Obsidian Dome Trail?

The terrain is unique, characterized by its volcanic origins. You'll encounter countless jagged obsidian formations, vast pumice fields, and large basalt rocks. Some sections may be sandy, and while parts are a wide dirt road, other areas, especially around the dome, can be less defined. Be prepared for sharp obsidian fragments.

What makes the Obsidian Dome Trail unique?

This trail offers a truly unique experience due to its dramatic volcanic landscape. It's a striking example of a volcanic dome, formed by a 'phreatic blast' that created massive accumulations of glittering black obsidian. The opportunity to walk among such vast quantities of volcanic glass, historically used by indigenous peoples for tools, makes it an educational and memorable hike.

When is the best time of year to hike the Obsidian Dome Trail?

The best time to hike is generally during the spring, summer, and fall months when the weather is mild and the access roads are open. Winter months bring snow and road closures in Inyo National Forest, making access difficult or impossible. Always check local weather and road conditions before planning your trip.

Is the Obsidian Dome Trail dog-friendly?

Yes, the Obsidian Dome Trail is generally dog-friendly. However, it's always best to keep your dog on a leash and be mindful of the sharp obsidian fragments that could potentially harm paws. Ensure you carry enough water for both yourself and your pet, as there is no water available on the trail.

Is the Obsidian Dome Trail suitable for children?

Yes, the shorter, easier sections of the Obsidian Dome Trail are generally suitable for children, offering an engaging and educational experience with its unique geology. However, supervise children closely due to the sharp obsidian fragments and uneven terrain. Longer loops or less defined paths might be more challenging for younger hikers.

Does the Obsidian Dome Trail connect with other paths?

Yes, the route incorporates sections of other paths. Specifically, it follows parts of the "Obsidian Loop Road" and the "2S10" trail, offering options for extending your hike or creating a loop around the dome.

What kind of views can I expect on the trail?

The trail offers sweeping views of the majestic High Sierra, providing a unique perspective on the Eastern Sierra's profound volcanic history. You'll also be immersed in the dramatic volcanic landscape, with glittering black obsidian formations and vast pumice fields creating an 'otherworldly' environment. The western side of a potential loop around the dome is more forested.

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