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Obsidian Dome

Certificate of Excellence
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Address: Deadman Summit, June Lake Loop, Mammoth Lakes, CA

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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TripAdvisor Reviewer Highlights

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  • 33
  • 29
    Very good
  • 10
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Tough to get to

The road in is very rough, windy and bumpy. But we did it in a small hatchback car. Rocks are very cool was only a few other people there when we visited.

4 of 5 bubblesReviewed 8 December 2016
San Marcos, California
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76 Reviews from our TripAdvisor Community

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Showing 72: English reviews
Level Contributor
35 reviews
18 attraction reviews
common_n_attraction_reviews_1bd8 7 helpful votes
3 of 5 bubbles Reviewed 28 December 2016 via mobile

The Obsidian dome is rather easy to find. You an drive up the way to it till a gate. Actually there is no sign telling you were it is, of course you see on the leet side of the street many rocks but it never looks like a real "entrance". We did park close by to the gate and climbed... More 

Thank Simon B
San Marcos, California
Level Contributor
869 reviews
436 attraction reviews
common_n_attraction_reviews_1bd8 153 helpful votes
4 of 5 bubbles Reviewed 8 December 2016

The road in is very rough, windy and bumpy. But we did it in a small hatchback car. Rocks are very cool was only a few other people there when we visited.

Thank JimmyJackk
Winnemucca, Nevada
Level Contributor
115 reviews
27 attraction reviews
common_n_attraction_reviews_1bd8 72 helpful votes
5 of 5 bubbles Reviewed 10 October 2016 via mobile

This is the most interesting place I have been in a while. My daughter and husband walked to the top and got some great pictures of the dome area and the surrounding peaks. If you look hard enough you can even find the main hole of the explosion. It's awesome how there are trees growing in this desolate place.

Thank Phyllis V
Albion, California
Level Contributor
24 reviews
6 attraction reviews
4 of 5 bubbles Reviewed 9 October 2016

If you're interested in rocks or you like to hike, this is a beautiful little side trip. You can either drive on the not-so-great road while admiring the sun dancing on the obsidian cliff face, or you can park and hike to the top to enjoy a spectacular view.

Thank Catherine K
Coto de Caza, California
Level Contributor
209 reviews
87 attraction reviews
common_n_attraction_reviews_1bd8 58 helpful votes
3 of 5 bubbles Reviewed 2 October 2016 via mobile

Amazing lava flows from the main volcano vent. Very tall and probably the tallest I've ever seen. Lots of low grade obsidian in huge boulders. Incredible sight to see. I was hoping to find some snow-flake obsidian or pure black onyx dense quality grade billets. May need to spend a few days here next spring and hike the entire dome... More 

Thank Eric B
Redondo Beach, California
Level Contributor
242 reviews
117 attraction reviews
common_n_attraction_reviews_1bd8 105 helpful votes
5 of 5 bubbles Reviewed 29 September 2016

We went close to sunset and it was a fantastic time to observe the obsidian. The road down is difficult and only recommended for 4-wheel/all-wheel drive. The loop around take about 45 minutes.

Thank Janice N
Melbourne Beach, Florida
Level Contributor
99 reviews
22 attraction reviews
common_n_attraction_reviews_1bd8 23 helpful votes
4 of 5 bubbles Reviewed 28 September 2016

There are several ways to get here, ist thru Lava Beds National monument - it is a 15 mile dirt road, my husband wasn't thrilled with more dirt roads so we continued down past the visitor center in Lava Beds on route 10 then turned west at Tionesta intersection and continued west - there are two dirt roads leading up... More 

Thank Kaylee4848
Camarillo, California
Level Contributor
38 reviews
14 attraction reviews
common_n_attraction_reviews_1bd8 9 helpful votes
4 of 5 bubbles Reviewed 16 September 2016

If you enjoy learning new things, then visit. It is fascinating how this came to be. That being said, be careful. The rocks are razor sharp and nothing preventing your kiddos from climbing up them- except responsible parenting. One slip or misstep and it will be an emergency!

Thank connie h
Menlo Park, California
Level Contributor
237 reviews
62 attraction reviews
common_n_attraction_reviews_1bd8 120 helpful votes
4 of 5 bubbles Reviewed 15 September 2016

I've been here several times and always enjoy Obsidian Dome. It's a short drive down a very good dirt road right off of US 395, on the way to Mammoth Lakes from June Lake or Mono Lake. You can scramble up the dome, or drive a little farther down and walk up an old road (apparently from a pumice mine)... More 

Thank JerryR10
San Luis Obispo, California
Level Contributor
53 reviews
22 attraction reviews
common_n_attraction_reviews_1bd8 2 helpful votes
5 of 5 bubbles Reviewed 12 September 2016

We had been to Obsidian Dome several times but never went up to the top. The trail is well maintained and a vert walk. Once on the top, endless piles of boulders and rocks, weird magma flow patterns...an other world. Because of the nature of the rocks and being glass like based, walking on the smaller chunks sounds like walking... More 

Thank Wanda L

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Torrance, California
over a year ago

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  • Is there a restaurant or café onsite?