The Pierre Shale formation was deposited during the Paleogene and Cretaceous periods about 70 million years ago. The region was covered by a deep sea—the Cretaceous Western Interior Seaway—which deposited massive amounts of shale on the seabed. Both the thick stratum of shale and embedded marine life fossils—including ammonites and skeletons of fish and such marine reptiles as mosasaurs, plesiosaurs, and extinct species of sea turtles, along with rare dinosaur and bird remains—were created during this time period. The area now known as Colorado was eventually transformed from being at the bottom of an ocean to dry land again, giving yield to another fossiliferous rock layer known as the Denver Formation.[58]
Louisville is conveniently situated between Denver and Boulder, offering visitors an attractive weekend getaway destination with a distinctive American small-town feel. You can stroll through the historic Old Town, where several historic buildings now house modern shops, restaurants and businesses. Downtown is also home to the Louisville Art District, which is packed with galleries, studios and hosts a monthly First Friday Art Walk. Live music and theater is popular and you can catch a concert at the Center Stage Theatre Company or the Coal Creek Community Theater. Outdoor activities include walking, hiking, biking and ice skating, while nearby Boulder offers many additional cultural and outdoor attractions.

Guests are treated to a delicious gourmet three-course breakfast every morning along with complimentary bedtime snacks. An intimate library and comfortable lobby offer the perfect place to curl up with a book, an experience that is even nicer when it’s done in front of a crackling fire. The adjacent Rocky Mountain National Park provides a variety of activities from hiking and mountain biking to mountain climbing, fishing, and wildlife watching.
What could be more romantic than enjoying a candlelit dinner for two as you gaze out over the elegant natural beauty of the Rocky Mountains? In Colorado, this is an occurrence that happens on a regular basis thanks to the close proximity to these majestic peaks. The Antlers at Vail has luxurious condos and vacation homes for a great private retreat. Enjoy your proximity to Vail Mountain and curl up by your gas fireplace. The Osprey at Beaver Creek, A RockResort is your perfect romantic getaway with steam showers and stunning fireplaces in your luxurious accommodations. And for a great experience, Mt. Prince Hot Springs Resort has the elegant Princeton Club and gorgeous hot springs to warm and relax you and your sweetheart in bliss. Start planning your own romantic rendezvous to Colorado today! 
Victorian elegance sets the standard for southwestern hospitality at the General Palmer Hotel, located in the heart of Durango, Colorado. Opened in 1898, it was named for one of this town’s founding fathers and remains as the only historical Four Diamond in southwestern Colorado. In the heart of downtown Durango, you can park your car and enjoy easy walking distance to art galleries, specialty stops, and a variety of restaurants.

Durango - very popular for romantic getaways in Colorado during the summer, and for good reason. The gorgeously restored Main Ave combines Victorian-era Hotels and Wild-West Saloons, giving the city a remarkable atmosphere. There's plenty of scenic drives nearby, and the steam-engine narrow gauge rail journey up to Silverton is a wonderful daytrip.

There are several Front Range towns that have fun winter attractions that are worth experiencing. Next time you’re passing through Idaho Springs, relax at Indian Hot Springs or go snowshoeing in the Arapaho National Forest. Georgetown hosts ice races on its frozen lake. While in Evergreen, make use of the giant frozen lake by ice skating or fishing.

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