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Obsidian Dome

Deadman Summit, June Lake Loop, Mammoth Lakes, CA
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Ranked #14 of 26 attractions in Mammoth Lakes
Type: Geologic Formations
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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35 reviews from our community

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English first
Fremont, California
Top Contributor
736 reviews 736 reviews
373 attraction reviews
692 helpful votes 692 helpful votes
5 of 5 stars Reviewed July 23, 2014 NEW

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
69 reviews 69 reviews
49 attraction reviews
66 helpful votes 66 helpful votes
4 of 5 stars Reviewed July 20, 2014 NEW

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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Napa, California
Top Contributor
107 reviews 107 reviews
30 attraction reviews
37 helpful votes 37 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
95 reviews 95 reviews
28 attraction reviews
21 helpful votes 21 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
5 helpful votes 5 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
62 reviews 62 reviews
14 attraction reviews
28 helpful votes 28 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
Senior Contributor
48 reviews 48 reviews
14 attraction reviews
19 helpful votes 19 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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Los Angeles, California, United States
Senior Contributor
48 reviews 48 reviews
27 attraction reviews
26 helpful votes 26 helpful votes
4 of 5 stars Reviewed August 13, 2013

The drive in from H395 is easy although on a dirt road. This is a mountain of black obsidian otherwise known as volcanic glass. There are huge boulders weighing several tons as well as smaller pieces reflecting the sun. The early native Americans collected this obsidian for making arrowheads and projectile points and for trading throughout the southwest. Remember not... More

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Menifee, California
Senior Contributor
26 reviews 26 reviews
17 attraction reviews
28 helpful votes 28 helpful votes
4 of 5 stars Reviewed July 16, 2013

Fans of geology will enjoy this quick side trip to see a large dome comprised of obsidian, sometimes referred to as "black glass" for its shiny appearance. Native Americans used this resource for arrowheads. Someone taking this trip should also check out the nearby Inyo Craters, and if time allows, the Bald Mountain Lookout. Devil's Punchbowl, the Wilson Butte, Mono... More

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Richmond, Virginia
Top Contributor
72 reviews 72 reviews
28 attraction reviews
31 helpful votes 31 helpful votes
5 of 5 stars Reviewed May 3, 2013

we almost missed it, no sign, we did not see a trail, keep the dome on your left and take a right,,,,,go up, up, up. AWESOMENESS awaits you.

Was this review helpful? Yes 3

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