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Address: Deadman Summit, June Lake Loop, Mammoth Lakes, CA
Description: Location is in Mono County near June lakes, this natural dome was created...
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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Geology nerds--this is YOUR kind of place

Great mid-day, mid-level hike of less than three miles round-trip up and down the dome. Wear sensible shoes with good ankle support; if you explore off the trail, the stones are... read more

4 of 5 starsReviewed April 15, 2015
Tenighir
,
Diamond Bar, California
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41 Reviews from our TripAdvisor Community

Date | Rating
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English first
Diamond Bar, California
Top Contributor
159 reviews 159 reviews
65 attraction reviews
99 helpful votes 99 helpful votes
4 of 5 stars Reviewed April 15, 2015

Great mid-day, mid-level hike of less than three miles round-trip up and down the dome. Wear sensible shoes with good ankle support; if you explore off the trail, the stones are unstable under your feet; slipping and sliding is part of the experience.

Was this review helpful? Yes 1
Camarillo, California
Reviewer
4 reviews 4 reviews
3 attraction reviews
3 helpful votes 3 helpful votes
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!

Was this review helpful? Yes 2
Livermore,CA
Top Contributor
52 reviews 52 reviews
11 attraction reviews
40 helpful votes 40 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 

Was this review helpful? Yes 2
Imperail Beach
Top Contributor
60 reviews 60 reviews
25 attraction reviews
14 helpful votes 14 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.

Was this review helpful? Yes 1
Fremont, California
Top Contributor
2,500 reviews 2,500 reviews
1,548 attraction reviews
1,461 helpful votes 1,461 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 

Was this review helpful? Yes 1
Thoiry, France
Top Contributor
75 reviews 75 reviews
52 attraction reviews
108 helpful votes 108 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 

Was this review helpful? Yes 4
Yountville, California
Top Contributor
118 reviews 118 reviews
32 attraction reviews
48 helpful votes 48 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
115 reviews 115 reviews
35 attraction reviews
29 helpful votes 29 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 

Was this review helpful? Yes 2
so. bay
Senior Contributor
21 reviews 21 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.

Was this review helpful? Yes 2
Los Angeles
Top Contributor
62 reviews 62 reviews
14 attraction reviews
32 helpful votes 32 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.

Was this review helpful? Yes 3

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