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Address: Deadman Summit, June Lake Loop, Mammoth Lakes, CA
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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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Obsidian heaven

You have to be a bit of a rock hound of really into volcanoes to care about this big mound of rock bursting with obsidian. We got a big kick out of it.

4 of 5 starsReviewed August 23, 2015
lovetoplan57
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Las Vegas
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51 Reviews from our TripAdvisor Community

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English first
Las Vegas
Level Contributor
12 reviews
common_n_attraction_reviews_1bd8 8 helpful votes
4 of 5 stars Reviewed August 23, 2015

You have to be a bit of a rock hound of really into volcanoes to care about this big mound of rock bursting with obsidian. We got a big kick out of it.

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Edgewater, Maryland
Level Contributor
63 reviews
37 attraction reviews
common_n_attraction_reviews_1bd8 37 helpful votes
5 of 5 stars Reviewed August 3, 2015

Being an elementary school teacher, I could not pass up this side trip...and it was actually very easy...we rented a little compact car and had no trouble on the road...just go slow! To see this mountain of Obsidian was quite astounding! Don't miss it if your near...it is just 10 minutes or so off the main road.

Was this review helpful? Yes 1
Pebble Beach, California
Level Contributor
79 reviews
4 attraction reviews
common_n_attraction_reviews_1bd8 81 helpful votes
5 of 5 stars Reviewed July 14, 2015

We really enjoyed exploring Obsidian Dome and the nearby Glass Creek Dome. The road to it is a bit bumpy and might not be good for low-riding cars, but it was fine for us in my Highlander. We were there on a cold and rainy July day, and had the place nearly to ourselves. The rocks are beautiful and it... More 

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Goleta
Level Contributor
90 reviews
17 attraction reviews
common_n_attraction_reviews_1bd8 27 helpful votes
3 of 5 stars Reviewed July 10, 2015

I do need to warn you, if you go in off 395 the road is paved for 1/4 of a mile, then it's dirt for a mile and a half. After that take your teeth out and put them in the ashtray it gets rough. We drove in keeping the dome on our left until a little yellow sign caught... More 

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vista, ca
Level Contributor
49 reviews
9 attraction reviews
common_n_attraction_reviews_1bd8 24 helpful votes
5 of 5 stars Reviewed July 8, 2015

Fun hike with tons of obsidian everywhere. It's a generally easy hike, although sun exposure and loose footing can be of concern. Definitely worth doing if you're in the area. Fairly short with minimal elevation change (except the first part where you hike up the road)

Was this review helpful? Yes 1
La Crescenta, California, United States
Level Contributor
9 reviews
5 attraction reviews
common_n_attraction_reviews_1bd8 3 helpful votes
4 of 5 stars Reviewed July 5, 2015

We had fun off-roading it to the Obsidian Dome (actually a gravel road) in our Camry. The dome and near-by glass creek are interesting features and the only places in the area where you will find obsidian.

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Gardena, California
Level Contributor
7 reviews
3 attraction reviews
common_n_attraction_reviews_1bd8 7 helpful votes
5 of 5 stars Reviewed July 4, 2015

Ha anyone that has kids that play minecraft must make this a thing to do. Obsidian is a major element of the game. They get to climb around and search for Obsidian and lava rocks. Yes lava rocks! Mention this and watch the excitement in their eyes! Requires a short drive down an unpaved road but nothing like 4x4ing. Fun... More 

Was this review helpful? Yes 1
Bonita, California
Level Contributor
78 reviews
19 attraction reviews
common_n_attraction_reviews_1bd8 39 helpful votes
5 of 5 stars Reviewed June 16, 2015

I have been going to Mammoth for years and always saw the sign for Obsidian Dome but never stopped. It is accessible by a dirt road and is worth the 5-10 minutes it will take you to get there. The wall of Obsidian is impressive!. I had never seen anything like it. When I went there was no one else... More 

Was this review helpful? Yes 1
San Angelo, Texas
Level Contributor
301 reviews
95 attraction reviews
common_n_attraction_reviews_1bd8 168 helpful votes
3 of 5 stars Reviewed June 14, 2015

My husband and I made this long drive over a pretty bumpy road. The dome is nice but not sure I would make the drive again.

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Diamond Bar, California
Level Contributor
194 reviews
77 attraction reviews
common_n_attraction_reviews_1bd8 107 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 3

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