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Obsidian Dome

Deadman Summit, June Lake Loop, Mammoth Lakes, CA
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Ranked #12 of 25 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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33 reviews from our community

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Date | Rating
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English first
Napa, California
Top Contributor
100 reviews 100 reviews
28 attraction reviews
19 helpful votes 19 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
87 reviews 87 reviews
25 attraction reviews
16 helpful votes 16 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
15 reviews 15 reviews
11 attraction reviews
3 helpful votes 3 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
61 reviews 61 reviews
14 attraction reviews
22 helpful votes 22 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
43 reviews 43 reviews
14 attraction reviews
15 helpful votes 15 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
43 reviews 43 reviews
25 attraction reviews
24 helpful votes 24 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
24 helpful votes 24 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
29 attraction reviews
28 helpful votes 28 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.

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Auckland Region, New Zealand
Senior Contributor
45 reviews 45 reviews
10 attraction reviews
14 helpful votes 14 helpful votes
3 of 5 stars Reviewed April 21, 2013

Heard some good reviews however we didn't really enjoy obsidian dome, to be honest it looked like a mountain of tarseal. Perhaps it's just not our thing. The driving track there isn't the best not signposted well and we ended up off road accidentally on some dodgy terrain

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California
Senior Contributor
27 reviews 27 reviews
10 attraction reviews
29 helpful votes 29 helpful votes
4 of 5 stars Reviewed March 5, 2013

Lots of trails around Obsidian Dome. Wonderful for day hikes. In the winter, there is a little parking lot by Hwy. 395, and from there you can cross country ski or snow shoe along the groomed road. There is no charge for this. The glistening obsidian and snow are so pretty in the winter.

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