← All Days Day 27 Saturday, June 20, 2026

Shelley, Potatoes & Register Rock

📍 Lava Hot Springs to Glenns Ferry, ID

Bye bye to Lava Hot Springs.

Things we found out about this place: it is a popular place in the summer for rafting down the Port Neuf River, mineral water is naturally heated underground, and despite its small size, hundreds of thousands of people visit every year.

Lava Hot Springs in Idaho
Port Neuf River area in Lava Hot Springs

Up early to take off to the next destination. I am getting used to it… Keith promised me coffee. We saw quite a few coffee houses downtown but only one was open at 0730! Crazy. So the barista got a good tip for opening early. ☕️

In Idaho the speed limit is a bit higher than we are used to… not that we would go that fast!

We passed this on the highway. If you look verrrry close, you can see the radioactive sign on the side. If you Google this image, you get:

“This is a Type-B cask specifically designed for the transportation of radioactive materials.”

Highway speed limit sign in Idaho
Type-B radioactive materials cask on the highway in Idaho

Shelley, Idaho

I convinced Keith to take a small side trip to a place I have been wanting to check out since I moved back to WA. A lovely town on the Snake River, Shelley, Idaho.

Shelley Idaho sign near the Snake River

Snake River area in Shelley Idaho
Downtown Shelley Idaho
View around Shelley Idaho

Blackfoot & Potatoes

From there we headed to Blackfoot to go to the Potato Museum. Before it opened, we decided to get a few things from WalMart. As we were heading into town, we met this lovely gentleman. He pulled us over, welcomed us into town and cautioned us about going too fast.

Apparently, the speed limit is 25 MPH unless otherwise posted. We had slowed but apparently, not enough. SO, he did say he had a math teacher by the name of Mr. Cooke and I think that is why we just got a warning…

Police officer who welcomed us to Blackfoot Idaho

And we finally made it to the museum! Every out of town paying guest received a package of Idaho potato instant mashed potatoes.

Idaho Potato Museum in Blackfoot

Idaho Potato Museum exhibit in Blackfoot
Potato history display at the Idaho Potato Museum
Idaho Potato Museum display

We did get to see how McDonalds fries are made!

Below is a collection of the diseases potatoes can get which will quickly ruin a crop.

Potato diseases display at the Idaho Potato Museum

Driving through Blackfoot on our way to a historical marker, at 25 MPH, I saw these things from the passenger seat. On the left is an older potato holding area. I have no idea who she is or what she represents and the warehouse is just something that looks like it has been there a while.

Older potato storage building in Blackfoot
Statue seen from the passenger seat in Blackfoot
Old warehouse in Blackfoot Idaho

Fort Hall

First historical stop was Fort Hall. This is part of the settlement the US government made with the Indians. One of the reservations. Fort Hall used to be a trading post for fur traders and Indians.

A lot of the historical markers we are seeing were erected by groups such as the Boy Scouts of America, noted at the bottom of the plaque on the right, Daughters of the American Republic and other groups fund raising and erecting them.

Fort Hall historical marker in Idaho
Fort Hall plaque erected by the Boy Scouts of America

More ruts?? Yup. Keith hiked out and found the trail along the Snake River.

Oregon Trail ruts along the Snake River
Keith hiking near trail ruts by the Snake River
Trail along the Snake River in Idaho

We got to see a lot of the Snake River as we drove toward Glenns Ferry and our next stop.

Snake River view on the drive toward Glenns Ferry


Register Rock

Register Rock. This was a good stop for the settlers. Green grass, water from the river, trees for firewood. We are standing in front of a slab of basalt. In the second picture you can see where the settlers had a little time on their hands and engraved their names and dates into the rock.

Register Rock basalt slab in Idaho
Names engraved in Register Rock
Historic engravings at Register Rock

Below is an engraving of an Indian and a preacher carved by a seven year old on the trail. He was on his way to Portland where he settled with his parents. He became a sculptor and returned to this rock to sign his name, J.J. Hansen, under the Indian head.

J.J. Hansen carving at Register Rock

After going off the highway to view a historical sign, we passed this going on at someone’s home… Two giant slip n slides! There was some sort of celebration going on and lots of cars. What fun this could be! Although, looking at the hill, I might’ve asked for a rope tow.

Giant slip n slide at a home in Idaho
Celebration with slip n slides on a hill in Idaho

Once we were settled in our campsite, some of our party took these photos:

Evening view from the campsite near Glenns Ferry
Campsite sunset near Glenns Ferry

Around 9:30 a few of us drove to the Visitor’s Center for an astronomy talk. We ended the evening looking at the craters on the moon and Venus up close.

Astronomy talk at the visitor center near Glenns Ferry


We have been writing little sayings on the back of our rigs. Here is the saying I chose:

“Go fast enough to get there, but slow enough to see.”

— Jimmy Buffett