Along WY-28 and WY-131

One of my favorite roads is WY-28, and one of my favorite places is Sinks Canyon, just off WY-28 near Lander. The middle fork of the Popo Agie River(*Puh - Po Shuh) "sinks" into a limestone cavern and then reappears on the other side of the ridge. It can take water up to two hours to make the journey through the cavern. It's a incredible place.

Not for those without good walking shoes or agility, however. There's a bit of scrambling up and down the enormous rocks that were left there from the last Ice Age. The ice scraping down the canyon exposed the deeply buried Madison Limestone Formation and then billions of gallons of water from the melting glaciers flowed into the soft rock, creating the underground passages.

The Sinks are still slowly eroding from current of the river, but haven't changed much over the past hundred years. Historic photos from the early 20th century show the cavern to be almost identical to how it looks today. Which is kinda cool, geological speaking. :)

Get a sandwich at The Breadboard in town while you're at it. I highly recommend the Hot Pastrami.

Red Canyon: remember, red usually mean IRON!

*How Do You Pronounce Popo Agie?