Did you know that the horse evolved in North America?

The Hagerman Horse, Equus Simplicidens, Idaho’s state fossil, was the first true horse. It was about the size of a modern Arabian horse. However, its bones most closely resembled those of the Grevy’s zebra.

Hagerman is home to over two hundred different species of fossil plants and animals. The list includes Sabertooth Cat, a Hyena-like dog, Peccary, Mastodon, Otter, Bear, Shrew, Camel, and Ground Sloth, as well as many other species. With over 3,000 new fossil fragments found each year, it is one of the most fossiliferous Pliocene-aged sites in the world.

The monument also includes a portion of the Oregon Trail. Information related to the entire Oregon Trail as well as the Idaho portion is available in the Visitor Center.

Interpretive programs include Hagerman Fossil Beds NM and Paleontologist Junior Ranger programs, paleo porch programs, Junior Paleo Camp, and Oregon Trail living history programs.

Come explore our Visitor Center with the Discovery Center, fossil displays, introductory DVD and learn more about our fascinating fossil park and the Oregon Trail!

Trip Itineraries

Memorial Weekend in Southern Idaho

The weather is finally getting warm, and the flowers are in full bloom. Memorial Day weekend is the perfect time to get out and enjoy the nature of Southern Idaho!

Top 10 Things to Do In Southern Idaho

Your Guide to the Most Astounding, Eye-Popping, and Obscure Sights and Activities in the Region Southern Idaho is not flashy. ...

Top 10 Must See in Twin Falls

Spending the weekend in Twin Falls and want to enjoy the town? From a local perspective, we created a top ten must see list! Read all our recommendations on the perfect list of things to do, plus advice only a local would know.

Women Solo Travel in Southern Idaho

Women solo travelers are welcome to Southern Idaho! Hike our unique locations and feel safe while doing it alone. Experience nature, kind hikers, and beautiful views all around!

Tea Kettle Cave - Gooding, Idaho

Tea Kettle Cave, located north of Gooding, Idaho is an incredible place. Explore under Earth's surface to find an oasis of green ferns, and a lava tunnel that will blow your mind!

Mogensen Trail Snake River Canyon

Mogensen Trail is conveniently located minutes from Twin Falls and Jerome. Enjoy waterfalls, bridges, BASE jumpers, and more on this peaceful hike!

Box Canyon State Park and Nature Preserve

Earl M. Hardy Box Canyon Springs Nature Preserve is a sight to be seen. Being the 11th largest spring in ...

The Ultimate Waterfalls Guide

Chasing waterfalls? The ultimate waterfall guide of Southern Idaho will give you directions, advice, and other facts about epic waterfall adventures!

Explore the Secrets of Black Magic Canyon

The smooth rock walls of Black Magic Canyon, carved by the Big Wood River thousands of years ago, provide an Arizona slot canyon aesthetic. In the summer, the water carves through the lava rocks, hiding it as if it didn't exist. But in the fall and winter - there is epic exploring to be done!

Top 10 Spring Break Destinations

Explore Southern Idaho's 10 best Spring Break locations! Who needs the beach when you have snow covered mountains and waterfalls to see?