I think now is a good time to mention the Sturgis Motorcycle Rally. Each year, in the first week of August, hundreds of thousands of bikers gather in Sturgis, South Dakota. There's nothing that says the rally is specifically for Harley-Davidson enthusiasts, but it is clear with a single glance that this is not for the Yamaha and Kawasaki crowd.
The rally wouldn't begin until Monday. Today was only Saturday. Still, the roads were choked with hogs. And I've never seen so many tattoos in all my life.

The center lane of downtown Custer was turned into motorcycle parking. And every spot was taken! Custer is 70 miles from Sturgis. If it got this congested this long before the actual rally begins, this far away, just imagine what Sturgis itself will look like on opening day!

It makes me glad that we're headed west today. I prefer open roads to those clogged with motorcycles. There is absolutely nothing in eastern Wyoming. No trees. Few hills. Barely any freeway exits. Towns were nonexistent.

In central Wyoming, the terrain changes. We entered the Bighorn Mountains. It was time for Ma to hang on for dear life again. At least the steep curves are guarded with a steel rail here.

We stopped in Cody to stock up on groceries. On the other side of Cody we passed through Buffalo Bill State Park. Lucky for us, the park built a tunnel through the mountain instead of making you drive over it.
It's only a few more miles to our destination: Yellowstone.