Ammonite Site Hike is hosted by Kremmling Library and volunteer hiking guide, Bill Wyatt. Meet at the library to caravan and join the exploration and a picnic lunch (bring your own food and drink). Participants will be able to collect one fossil to take home as a souvenir. Please dress appropriately, bring lots of water, sunscreen, and bug spray. Did you know Colorado was once covered by an ocean? You can ﬁnd ripple marks on rocks and ocean fossils in various places in Colorado. After the Cretaceous Western Interior Seaway dried up, it left hundreds of ammonites on a 200-acre site near Kremmling. This is the only place in the world where you can find such a high concentration of the fossils of these squid-like creatures that lived inside coil-shaped shells.