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]
Isle Royale National Park is situated on an island on Lake Superior near the Canadian border. This beautiful island spans 432 square miles and was shaped into its present form by Ice Age glaciers. Today it is home to a wide range of wildlife including herring gulls, wolves, otters, foxes, falcons, and ospreys. When you want to explore unspoiled wilderness this park is the perfect destination.
Tucked away in the Rocky Mountains in Idaho Springs, the Silver Lake Lodge is a cozy log cabin-style lodge that offers a relaxing and luxurious mountain retreat. Artfully blending rustic luxury with warm Colorado hospitality, the lodge boasts plush guest rooms with private bathrooms, modern amenities, and delicious, home-cooked cuisine. Guests can choose from a variety of retreats that cater to different size groups, from romantic one-bedroom cabins to family-sized lodges.
The park's climate is also affected by the Continental Divide, which runs northwest to southeast through the center of the park atop the high peaks. The Continental Divide creates two distinct climate patterns - one typical of the east side near Estes Park and the other associated with the Grand Lake area on the park's west side.[49] The west side of the park experiences more snow, less wind, and clear cold days during the winter months.[49]

Putting my Rocky Mountain inspired rectangles away until February, I eventually knitted up the remaining pieces and ironed the whole thing out before I framed the simple square and placed it on my beige wall. Perhaps I needed the chill of winter to remind me of the brisk breeze of that famous mountain range, maybe I briefly tired of sweater and cardigan projects, captivated instead by the simplicity of knit-purl in straight lines.
Although Aspen is best known as a winter sports destination, this lovely little town in the heart of the White River National Forest is a brilliant year-round destination for active adventurers, festival lovers and arts aficionados. Besides downhill skiing, you can try cross-country skiing, snowshoeing, snowmobiling, ice skating and dog sledding, before rounding off your day with Après-Ski cocktails, local craft beers or a delicious meal.
Every summer, Aspen gets taken over by classic music lovers during the renowned Aspen Music Festival and School with more than 300 concerts. Learn about Aspen from Dean Weiler during one of his popular Aspen Walking Tours and pay respect to John Denver at the John Denver Sanctuary you will pass by while hiking the picturesque Rio Grande Trail. Next read: best Aspen restaurants.

The city of Vail was built to accommodate the Vail Ski Resort, which is the largest single-mountain ski resort in the country. With 193 marked skiing trails, Vail is one of the nation’s most popular ski resorts as well. The Tyrolean-style village is nearly as well visited during the summer. Nearby streams and lakes stocked with fish make Vail an angler’s dream, and opportunities for river rafting abound. Horseback riding, mountain biking, golf and hiking are other popular warm-weather activities.
A home base for travelers visiting the Rocky Mountain National Park, Estes Park is less than a 2-hour drive from Denver. The park offers 355 miles of hiking trails paired with stunning vistas and landscapes, from snow-capped mountains to picturesque lakes and valleys, where those who crave adventure will find a myriad of outdoor adventures. Estes Park itself is a great area to explore, as visitors can meander the Riverwalk in Downtown Estes Park or hop on the Estes Park Aerial Tramway to the top of a small peak. Estes Park boasts a variety of shopping and dining experiences, while movie enthusiasts will want to stop by the world famous Stanley Hotel that was the inspiration behind Stephen King’s “The Shining.”
My mind calm, the knitting absorbed any excess energy and left my senses free to absorb the stunning surroundings. Feeling no need to move, I watched the silhouettes of fish moving upstream, hummingbirds zip over my head, and a northern harrier cruise over the grassland, looking for prey. Months later, I can imagine every detail of that spot on the bank anytime I close my eyes.
^ Montana State University states in their profile of Rocky Mountain National Park that there has been an increase of 2.5 °F (1.4 °C) in the average park temperature over "the past century" (charts show the period from about 1895-2010).[48] The National Park Service site states that the increase has been 3.4 °F (1.9 °C) over "the last century" (chart shows the period from about 1905-2010).[52]

Nicknamed the “Mile High City,” Denver is a haven for outdoor-lovers year-round, making it one of the best weekend getaways in Colorado for any type of travelers. Bring your camera along to capture views of urban and natural scenery alike—Larimer Square and the 16th Street Mall are two essential sightseeing destinations for first-timers, and Mount Elbert is always looming large in the background. The real Denver attraction, though, is the culture, which you can discover on a walk through the city’s distinct neighborhoods, on a Denver sightseeing tour, or a bike and brewery tour (it doesn’t get more Denver than that).

Just a few miles from the town of Estes Park, Rocky Mountain National Park is one of the most popular national parks in the United States. The soaring mountain peaks, alpine lakes and meadows, forests, and abundant wildlife showcase nature at its best. The park has more than 100 peaks over 10,000 feet, including Longs Peak, the highest in the park, at 14,259 feet.
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