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Obsidian Dome

Address: Deadman Summit, June Lake Loop, Mammoth Lakes, CA
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87%
Type: Geologic formations, Nature & Parks
Owner description: Location is in Mono County near June lakes, this natural dome was created out of lava which...
More attraction details
Attraction details
Type: Geologic formations, Nature & Parks
Owner description: Location is in Mono County near June lakes, this natural dome was created out of lava which solidified to black glass, hence the name, obsidian.
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40 reviews from our community

Visitor rating
    19
    16
    5
    0
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Date | Rating
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  • Portuguese first
  • Any
English first
Camarillo, California
Reviewer
4 reviews 4 reviews
3 attraction reviews
5 of 5 stars Reviewed January 12, 2015

Do you enjoy rock hopping, seeing unusual rock formations and quiet? This is a magical and odd place. Not many trees to divert the intensity of the rocks. Rocks everywhere and little caves; such a contrast to the magnificent blue sky and verdant green trees across most vistas. Be careful, sharp rocks…and please respect nature!

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Livermore,CA
Senior Contributor
48 reviews 48 reviews
11 attraction reviews
32 helpful votes 32 helpful votes
4 of 5 stars Reviewed October 20, 2014

This is an unusual volcanic feature consisting of huge chunks of obsidian sometimes mixed with a pinkish colored volcanic rock. A must see for the naturally curious, those curious about nature or anyone interested in geological process. Fine smaller specimens can easily be found. You drive in on a dirt road through the forest. We had no trouble navigating it... More 

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Imperail Beach
Top Contributor
56 reviews 56 reviews
23 attraction reviews
11 helpful votes 11 helpful votes
5 of 5 stars Reviewed August 29, 2014

A great place to check out and read some history on it. This young Obsidian Dome is on the the best places to see a hill of solid obsidian. The lavas were extruded as highly viscous flows much like toothpaste might be squeezed from a tube. Climb to the top for trails and interesting pieces.

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Fremont, California
Top Contributor
2,102 reviews 2,102 reviews
1,286 attraction reviews
1,228 helpful votes 1,228 helpful votes
5 of 5 stars Reviewed July 23, 2014

Obsidian Dome is a mile-long 300 foot high lava dome that is part of the Mono–Inyo Craters volcanic chain located in the Inyo National Forest. To see it, one needs to drive on a non paved road. Some of the rocks look just like rocks - average - nice but nothing special; but when you see the glistening black obsidian... More 

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Thoiry, France
Top Contributor
73 reviews 73 reviews
51 attraction reviews
99 helpful votes 99 helpful votes
4 of 5 stars Reviewed July 20, 2014

Certainly an impressive sight to see the volcanic rocks all piled up in a dome-like feature sitting in the middle of the pine forest. However, the quality of the obsidian was not what we thought, as we were hoping to find the very glassy black obsidian used to make arrow points. The bulk of the obsidian was not very glassy... More 

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Yountville, California
Top Contributor
118 reviews 118 reviews
32 attraction reviews
47 helpful votes 47 helpful votes
4 of 5 stars Reviewed March 10, 2014

Right off Highway 395. Rough road, dusty. potentially dangerous - stay off of that broken debris. A challenging adventure, best seen from the Hiway.

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San Jose, California
Top Contributor
106 reviews 106 reviews
34 attraction reviews
25 helpful votes 25 helpful votes
4 of 5 stars Reviewed December 4, 2013

While on a fishing trip in the east Sierra, I stopped by the site. This is a stop for geologists or students of the formation of this geographic area. Quite a spectacular mound of black glass. Little to no markings around the area. No amenities of any kind. Drive in on unpaved roads to the foot of the dome. The... More 

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so. bay
Contributor
16 reviews 16 reviews
11 attraction reviews
6 helpful votes 6 helpful votes
4 of 5 stars Reviewed October 14, 2013

Reaching the top of the Obsidian dome, a person should have a good tire patch kit or good spare tires. The road is littered with very sharp obsidian rocks, capable of slashing car and bike tires. The view at the top highlights the Mammoth and June Lake areas.

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Los Angeles
Top Contributor
63 reviews 63 reviews
14 attraction reviews
33 helpful votes 33 helpful votes
4 of 5 stars Reviewed September 3, 2013

You either are impressed or not. It looks like a big hunk of rock, but if you learn a bit about what it really is, it's impressive. It's a quick drive off the 395 to check it out. The kids were impressed and took some obsidian back to their teachers.

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Knoxville, Tennessee
Top Contributor
62 reviews 62 reviews
16 attraction reviews
30 helpful votes 30 helpful votes
3 of 5 stars Reviewed August 27, 2013

That's it. Don't expect anything else. But it is very impressive. This has to be the world's largest pile of riprap. So if you have an hour to kill and are fascinated by such naturally occurring phenomena, go for it. And do not consider driving the entire loop unless you have 4-wheel drive with high ground clearance (we did, and... More 

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