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Craters of the Moon National Monument, ID

September 16, 2018February 23, 2024 By Glen Bruels
This is part of a series called National Park/Monument Slam 2018
Show More Posts
  • Getting this trip on the road!
  • Craters of the Moon National Monument, ID
  • Fossil Butte National Monument, WY
  • Colorado National Monument
  • Waiting for surgery — Breckenridge, Chama, Great Sand Dunes National Park, and the UFO Watchtower!
  • The Road Home

We spent a few days at this national monument. Initially, we thought this would be a “drive by,” but this really turned out to be an amazing place. If you’ve spent time on the Big Island then sure, you’ve seen lava and volcanos. But this was a very different critter. Rather than big mountainous volcanic domes, all this volcanic activity came from a series of deep fissures, collectively known as the Great Rift. What is cool about that is you are just driving along through the plains and hills and all of a sudden, there is this massive landscape of lava of all different types. BTW, I asked if this rift was connected to the great caldera at Yellowstone and the answer was not only yes, but this area would erupt before Yellowstone goes.  The first day was windy and we had occasional showers.  That made for some really contrasty photos that highlighted the general barrenness of the landscape.  The highlight of the day was climbing the Inferno Cone, a steep trail in the middle of the scenic loop that provides panoramic views of the surrounding landscape of the Great Rift.  While you only climb 160 feet, the summit is at 6181 feet, meaning a little huffing and puffing.

Looking down at the remnants of some cinder cones near the North crater. These are some of the youngest lava flows in the part — a sprightly 2500 years.
Very eerie to look at.
A sign describing the volcanic process. I think most teenagers understand this process quite well — and suffer from “volcanic scars” everafter…
So eerie, but the textures and contrasts are amazing.
The thing that is so surprising is just how lush the growth is here
I don’t know what this was called, but this white ground cover against the black background was amazing.
And I have to say, I have never seen blonde pine cones…
Part of the reason for the lush growth is the rich soil, created by the breakdown of the rock by lichen like these. The bad news is that the lichen aren’t doing so well — air pollution is doing a number on them.
One of the fun things to do is to climb to the top of Inferno Cone.
A view from the top of Inferno Cone looking out towards other cinder cones on the horizon.
From the top of Inferno Cone, you can see the spatter and cinder cones lined up along the Great Rift.
Of course, then you have to walk back down again…
You can actually walk up to examine some of the cinder and spatter cones. It provides quite a view.
his is looking inside one of the spatter cones. You can really get the sensation of these splatters all sticking together.

We spent that night at a RV park in Arco, ID.  After Deb made Manhattans with very rudimentary bar equipment, we learned that the wife of the couple made and sold her own homemade fried chicken and, of course, we bellied up!  So bad, but so good!  The next day was a blue sky, bright sun one — so why not go underground?!  Actually, there are a series of lava tubes you can visit.  We ended up visiting two; the third (Boy Scout Tunnel) required you to crawl on your belly like a reptile, that neither of us was in the mood for.  These lava tubes created some very large tunnels. The largest (and most accessible) was Indian Tunnel.  You had to do a lot of rock climbing to get around and climb out of a hole to exit, but it was very doable.  Beauty Cave turned out to be anything but — you had to climb down a precarious set of rocks, enter the totally dark first chamber, only to find out that the rest of the cave was closed.  Before we left, I wanted to hike to the famous “tree molds” area, hoping to see great examples of something “frozen in time” from the lava flow.  While the hike was quite beautiful, I literally walked by the molds and ran out of trail.  After backtracking a bit, I found a couple of small examples.  Not quite up to the hype.

Enjoying a rustic Manhattan al fresco!
Just before you reach Indian Tunnel, you come across these two rock circles. Apparently, they have been here untouched since before the area was first surveyed in the early 1900s. The Shoshone used to migrate through this area, so there is some conjecture that they were used by them.
Deb descending the steps at Indian Tunnel.
Once you descend the stairs, mobility gets a bit more challenging at Indian Tunnel. Here is Deb rock climbing.
The inside of Indian Tunnel is amazing.
I really loved the ceilings.
Just to give you a sense of scale inside the first chamber of Indian Tunnel
Looking up at one of the openings from the tunnel
New friend, Amanda, finding her way to the exit of the tunnel
Deb crawling out of the tunnel.
Thank goodness for the pathways. Getting around without these would be impossible — not to mention very damaging to the lava formations.
A couple of words about the lava. Here you see the three kinds that are represented here: (1) A’a (broken, angular fragments from a thicker lava), (2) pahoehoe (smooth, billowy or ropy surface, and (3) pillow lava.
Some of the pahoehoe look like worm tubes.
This is kind of interesting. This blue covering is like glass that coats the lava to protect it. It is heavy in titanium. People can walk on this lava, breaking it up, and wearing away the protection.
Along the hike to the Tree Molds area, you come across interesting calderas…
… valleys.
… and weird formations. Deb thought this formation looked a lot like a dragon. I wasn’t using peyote though… Kidding! Just kidding!
This was one of two posts that I walked right by. These posts were the only indication that I had reached the tree molds. Pretty obscure!
We haven’t seen Pompeii yet, but have been told that exact molds of things were created. Here you have the mold of some of the local pine trees.

Anyway, there was a lot to see here —  old cinder cones, spatter tubes, fissures and rifts, and the really large lava tubes. What surprised us the most was the abundance of life that exists in this otherwise harsh landscape. While it is somewhat out of the way, this is definitely a NPS unit to visit!

This entry was posted in Idaho, National Park/Monument, Travel, United States
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Glen Bruels

I am a traveler and sometimes clay sculptor, following a long career working in consulting. My work allowed me to travel the world extensively and I was hooked. Today, I travel with my wife/best friend to explore new places, meet new people, and learn new things.

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