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United States
California
Mono County

Obsidian Dome Trail loop

Easy

4.5

(8436)

18,023

hikers

Obsidian Dome Trail loop

01:00

3.55km

70m

Hiking

Hike the easy 2.2-mile Obsidian Dome Trail loop to explore a unique volcanic landscape with glass-like rock and lunar-like terrain.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Inyo National Forest

Waypoints

A

Start point

Parking

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1

61 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.

Tip by

2

1.87 km

Glass Creek

Highlight • River

Great secluded campspots along the southern side of the small creek between two obsidian mountains of molten volcanic glass

Tip by

3

2.47 km

The Obsidian Dome and its neighbors Glass Creek and Deadman Dome all erupted in early fall of 1350. Scientists were able to date this last volcanic activity based on tree …

Tip by

B

3.55 km

End point

Parking

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Way Types & Surfaces

Way Types

1.89 km

1.63 km

Surfaces

1.89 km

1.63 km

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Elevation

Elevation

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Highest point (2,550 m)

Lowest point (2,480 m)

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Weather

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Today

Wednesday 8 July

30°C

6°C

0 %

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Max wind speed: 18.0 km/h

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Frequently Asked Questions

Where do I park for the Obsidian Dome Trail loop?

The trailhead for the Obsidian Dome Trail loop is accessible via unpaved gravel roads off Highway 395. While some roads might be passable in 2WD vehicles, a higher clearance vehicle is often beneficial for reaching closer parking areas, especially given the rough conditions and sharp volcanic rocks.

Is the Obsidian Dome Trail loop suitable for beginners?

Yes, the Obsidian Dome Trail loop is generally considered easy. The specific loop described is about 3.5 km (2.2 miles) with minimal elevation gain, making it accessible for most fitness levels and beginner hikers. While the dome itself can involve some undefined paths and sandy pumice, the overall route is manageable.

How long does it typically take to hike this loop?

The Obsidian Dome Trail loop typically takes around 1 hour to complete, depending on your pace and how much time you spend exploring the unique volcanic features. This estimate is for the 3.5 km (2.2 miles) route.

What unique features or views can I expect on this trail?

This trail offers an otherworldly experience with its striking volcanic landscape. You'll encounter vast fields of black, smooth, and glass-like obsidian, formed by a volcanic eruption approximately 600 years ago. Beyond the obsidian, you can enjoy sweeping views of the majestic High Sierra, especially from the western side of the dome which is more forested. The route also passes by Glass Creek and the Heart of Obsidian Dome - Volcanic Glass Mountain.

Is the Obsidian Dome Trail loop dog-friendly?

Yes, the Obsidian Dome Trail loop is generally dog-friendly. However, it's always best to keep your dog on a leash and be mindful of the sharp volcanic rocks, which can be tough on paws. Ensure you bring enough water for both yourself and your pet, as there are no water sources on the trail.

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

The best time to hike this trail is typically during the spring, summer, and fall months when the weather is mild and the roads are clear of snow. Summer offers warm, sunny conditions, while spring and fall provide cooler temperatures and potentially fewer crowds. Winter hiking is possible, but conditions can be snowy and icy, requiring appropriate gear.

Can I hike the Obsidian Dome Trail loop in winter?

Yes, you can hike the Obsidian Dome Trail loop in winter, but be prepared for snowy and potentially icy conditions. The area is also popular for cross-country skiing in winter, with designated trails. Always check local weather and road conditions before heading out, and wear appropriate winter hiking gear.

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

No, there are typically no permits or entrance fees required to hike the Obsidian Dome Trail loop, as it is located within the Inyo National Forest. However, always check the official Inyo National Forest website for any updates on regulations or fire restrictions before your visit.

What should I bring for a hike on the Obsidian Dome Trail loop?

For this hike, bring plenty of water, especially since there are no water sources on the trail. Sturdy hiking shoes are recommended due to the rocky and sometimes sandy terrain. Sun protection (hat, sunscreen) is essential, as much of the dome is exposed. A camera is also a great idea to capture the unique geological formations and scenic views.

Does this trail connect with other paths?

Yes, the route for the Obsidian Dome Trail loop incorporates sections of other paths. You'll find yourself on parts of the Obsidian Loop Road, the 2S10 trail, and the Glass Creek Meadow Trail as you navigate the area.

What is the terrain like on the Obsidian Dome Trail loop?

The terrain is characterized by its volcanic origins. You'll walk over fields of black, glass-like obsidian, which can be jagged. Some areas also feature sandy pumice, creating a 'lunar-like' landscape that can be a bit challenging to walk through. Beyond the immediate dome, you might encounter more forested sections, particularly on the western side.

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