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]

Another of Colorado's fourteeners, Mount Evans reaches an elevation of 14,271 feet. Almost equally impressive is the Mount Evans Scenic Byway, which extends almost to the summit. This is the highest paved road in the United States, reaching over 14,130 feet. The views from the top and on the way up, above the tree line, are outstanding, with meadows, lakes, and rolling mountains extending out into the distance. The area is so open and exposed that you have a good chance of seeing wildlife, particularly bighorn sheep.
Maroon Bells-Snowmass Wilderness showcases some of Colorado's most spectacular Rocky Mountain scenery and offers a chance to get out of your car and into nature. This area has six mountains over 14,000 feet, along with forests, alpine lakes, meadows, and 175 miles of trails to help you explore the terrain. Alternatively, you can enjoy the views on some of the scenic drives.
The sun made us lazy, and after following Brian as he made his way upstream I found a wider expanse of sand and gravel, promptly plopping down on a pair of flip flops I had brought in my backpack as a make-shift seat. After identifying the northern harrier hawk over my head, and the savannas sparrows and red-winged blackbirds perched precariously on reeds across the water, I took out my knitting project. I didn’t have to worry about losing Brian; in the valley I could see for miles in both directions.
Devil's Thumb Ranch Resort & Spa - Devil's Thumb Ranch Resort is really a special place for active couples. There's 3 types of accommodation (Bunkhouse, Lodge and Cabin), and outside an opportunity to experience some very romantic adventures like wagon & sleigh rides, zip-lining, horseback riding and evening campfires. As well, there's two restaurants, a wine cellar and a coffee shop. Oh, a word about their pool: it's heated geothermally, and since you actually enter it indoors and swim to the outdoor part, it's great on colder days and evenings. 2017 ERV Rating* for Couples - Romantic Colorado Ranch Resorts: 88% - Very Good. (3530 Country Rd 83, Tabernash, CO 970-726-5632)

A city that conjures up images of a magical winter wonderland, Aspen boasts beautiful surroundings, where visitors can soak up panoramic views of the Colorado Rockies against the area’s abundance of mountain chalets and popular ski areas. A mecca for winter sports enthusiasts, visitors can also find a wealth of high-end boutiques, interesting museums and excellent hiking trails. Whether you choose to climb to the summit, spot diverse wildlife or simply soak in your surroundings, the Maroon Bell peaks is a must on any itinerary. After a day of adventure at Aspen Mountain, Aspen Highlands or Buttermilk, relax at the world-famous and therapeutic Glenwood Springs.
Sleep helped the altitude sickness, and after a full night in one of the research site’s cabins, I felt much revived. Brian fished in the morning and I scrambled up a rocky outcropping with a graduate student studying pikas through their poop (a non-invasive way to analyze stress levels of this small mammal that looks like a cross between a rabbit and a mouse): but our afternoon was free. What to do?
Take the world’s largest outdoor mineral hot springs pool (Glenwood Hot Springs), add an adventure park built on top of a mountain (Glenwood Caverns Adventure Park), sprinkle in the Roaring Fork Valley’s crimson rocks and emerald forests and you have a memorable family vacation just a few hours from Denver. The new Historic Fairy Caves Tour at Glenwood Caverns Adventure Park has sections never opened to the public before, takes 50 minutes and has only 12 stairs (perfect for families with small children than the tour of King’s Row, which has 127 steps each way). Also, don’t miss the adventure park’s thrill rides including the Cliff Hanger Roller Coaster, bungee jumping station, zipling, giant canyon swing, alpine coaster, laser tag and much more. Glenwood Hot Springs is celebrating its 125th birthday this year, so guests get in free on their birthdays. Glenwood Canyon Resort has white water rafting on the Colorado River and for an extra thrill, soar on the zipline across the river or test your mettle on a ropes course. Grab your bikes and take the paved Rio Grande Trail, which winds along the Roaring Fork River from Glenwood to Aspen. If you visit mid-week, pack a picnic and enjoy free concerts at Two Rivers Park on Wednesday. For a night out on the town, your family will love the Glenwood Vaudeville Revue dinner variety show.
Although there are a limited number of dining establishments inside Rocky Mountain National Park, nearby Estes Park offers 70-some restaurants, which serve up a range of cuisines. You'll find a handful of fine dining establishments, including the traveler-favorite Twin Owls Steakhouse, but most of its restaurants are casual yet tasty spots. To refuel after a long day on park trails, travelers should head to Elkhorn Avenue in Estes Park for just about any kind of cuisine. For instance, Antonio's Real New York Pizza & Deli is a great spot to dine in or takeout, Nepal's Café is a prime place to fill up on Indian-Nepalese dishes, while Peppers Mexican Grill is beloved for its buffalo nachos. 
It’s hard to beat the majestic setting at The Peaks Resort & Spa in Telluride. This property is surrounded by the dramatic peaks of the Rockies in the southwestern region of the state, and is particularly renowned for its spa. Here you can indulge in a variety of rejuvenating treatments like hot stone therapy, soak in the eucalyptus-filled Jacuzzis or take advantage of personal training sessions. Enjoy your days taking part in outdoor adventures like mountain biking or hiking the spectacular trails and then come back to enjoy a
The house also features a hot tub on the second-floor deck, a modern entertainment living room with a large, flat screen television for movie watching and a lovely terraced back garden with a gazebo. Winter Park Chateau enjoys a prime downtown location within walking distance to many restaurants, cafés, and bars, as well as nightclubs. It is within walking distance of the ski mountain and close to four championship golf courses and Rocky Mountain National Park.
Known as a world-class ski destination, Aspen is beautiful year around and offers activities and attractions for all ages. Skiers can challenge their skills on the magnificent steeps, slopes and glades of Aspen Mountain or Ajax, on rugged Aspen Highlands or enormous Snowmass. Take a 14 minute ride with the Silver Queen Gondola to the top of Ajax Mountain for the spectacular views of the mountain peaks, the city below and tall evergreens all around you. There are bluegrass concerts on Sundays.
Keystone is the ultimate year-round outdoor playground. Families will discover a wealth of things to do to keep the kids, and themselves happy, with everything from a Kidtopia Play Park, Keystone Science School Day Camps and the summer snow tubing hill to stand up paddle boarding and boating on the lake, miniature golf, GPS Geo-Cache Adventures and dinner wagon rides. Then there are the festivals, like the Model Boat Regata, the Snake River Festival, and Cirque D’Wheels. If you stay at Keystone Resort, the Kidtopia Children’s Theatre hosted in the Quaking Aspen Amphitheatre is free every Friday.
A romantic weekend at the Castle Marne Bed and Breakfast on Capitol Hill in Denver will transport you to more elegant and romantic times with its nine magnificent rooms accented by antique Victorian furniture, fine décor, canopy beds, and fluttering curtains. Of course, they all have modern bathrooms with whirlpool or claw foot bathtubs and other contemporary amenities you simply cannot do without.
Considered the base camp for the Rocky Mountain National Park, Estes Park is less than a 2-hour drive from Denver. Located near the east entrance to the Rocky Mountain National Park, Estes Park is a quiet area surrounded by protected land. Here you’ll find pristine wilderness with a myriad of both indoor and outdoor activities, from scenic hikes and bike trails to wine tasting and spa treatments. Take the Estes Park Aerial Tramway to the top of a small peak and soak in breathtaking panoramic views of the valley and downtown area, take a walk along the Riverwalk in Downtown Estes Park or take the kids to the Estes Park Ride-A-Kart & Cascade Creek Mini-Golf.
CURRENT TRAIL CONDITIONS Trails are generally snowpacked and drifted. In general, traction devices and poles are advised. The further from the trailhead, or the less popular the trail, the more snowshoes are needed. If it is windy or there is new snow, tracks can disappear and you could lose your way unless you have good route-finding skills and proper equipment

19th-century ghost town, and hosts its own fabulous mineral hot springs. The five-star property enjoys a backdrop of aspens and the dramatic San Juan Mountain Range, situated about 30 miles southwest of Telluride. It’s the perfect place to disconnect from the chaos of the modern world and connect with the one you love. Nearby you can go heli-skiing, rock climbing or hike miles and miles of scenic trails. It hosts a ring of historic log cabins that now serve as luxurious retreats as well as other historic buildings that house a lavish spa, a well-stocked library and a saloon with wagon-wheel chandeliers.

In the summer, the Durango & Silverton Narrow Gage Railway is one of the town's main tourist attractions. This historic train runs day trips up the valley from Durango to the old mining town of Silverton, high in the mountains. Durango is also the terminus of the Colorado Trail, a 500-mile-long backcountry trail that runs from Denver to Durango. You can do a day hike or mountain bike along the trail, going out and back the same way. The trail follows the scenic Junction Creek and then climbs up to Gudy's Rest, where many people enjoy lunch and then turn around. In the town of Durango and in the surrounding mountains are numerous hiking and mountain biking trails.

Keystone is the ultimate year-round outdoor playground. Families will discover a wealth of things to do to keep the kids, and themselves happy, with everything from a Kidtopia Play Park, Keystone Science School Day Camps and the summer snow tubing hill to stand up paddle boarding and boating on the lake, miniature golf, GPS Geo-Cache Adventures and dinner wagon rides. Then there are the festivals, like the Model Boat Regata, the Snake River Festival, and Cirque D’Wheels. If you stay at Keystone Resort, the Kidtopia Children’s Theatre hosted in the Quaking Aspen Amphitheatre is free every Friday.
The Gant is one of the best romantic getaways for couples who like the flexibility of staying in a luxury condominium hotel located at the base of Aspen Mountain. The resort has two heated outdoor swimming pools, three hot tubs, five tennis courts, barbecue grills and laundry facilities. Summer activities in Aspen include whitewater rafting, fly fishing, golf, horseback riding, jeep tours, hot air balloon rides, parasailing and mountain biking. In the winter, plan a ski trip, snowboarding, snowshoeing, snowmobiling, sleigh rides, snowcat powder tours and ice skating.

At the entrance to Rocky Mountain National Park, the historic village of Estes Park offers shopping and dining in a quaint, alpine resort-style setting. The town is also home to the Stanley Hotel, which inspired Stephen King's "The Shining." Every September, Estes Park hosts the Longs Peak Scottish-Irish Highland Festival, one of the largest Celtic festivals in the nation.
Take a 7.5 mile hike on the Yampa River Core Trail along this picturesque river, and then jump into one of the hot pools at the Strawberry Park Hot Springs. Tread of Pioneers Museum tells the story of Steamboat Springs past and is located in a beautiful Queen Anne-style Victorian house. Take a ride with the Steamboat Scenic Gondola up the slopes of Mount Werner for some spectacular views of the area. 

Home to the Steamboat ski resort, Steamboat Springs is a city in Colorado’s Yampa Valley. One of the main attractions here are the geothermal hot springs, which people come to experience for its healing properties. The Old Town Hot Springs also has water slides and swimming pools, while the ski resort has six peaks including Mount Werner for the serious snowboarding and skiing enthusiast.

The Leland House and Rochester Hotel are family-owned historic hotels with an authentic Western theme. The 14 rooms at the Rochester Hotel are themed after Westerns that were filmed in the Durango area. Each of the 12 accommodations in the Leland House is named after a historic Durangoan and is decorated with that person’s memorabilia, biographies and photos. All rooms have Wi-Fi, cable, Aveda products, complimentary gourmet breakfast and free Cruiser bike rentals. Grab a drink at the Rochester Bar which serves the hotel’s signature Rochester wine.
Just a 5-minute stroll from downtown Estes Park, Fall River Village offers 66 luxury accommodations, including 60 two bedroom and two bathroom condos, a honeymoon suite, four three bedroom and four bathroom townhomes and a four bedroom townhome with panoramic views of the Continental Divide. Property amenities include a heated, outdoor pool, year-round, outdoor hot tubs, a community room, fire pit and grill areas as well as an outdoor recreation area with yard games and a hammock.
In the subalpine zone, lodgepole pines and huckleberry have established themselves in previous burn areas. Crystal clear lakes and fields of wildflowers are hidden among the trees. Mammals of the subalpine zone include bobcats, cougars, coyotes, elk, mule deer, chipmunks, shrews, porcupines and yellow-bellied marmots. Black bears are attracted by the berries and seeds of subalpine forests. Clark's nutcracker, Steller's jay, mountain chickadee and yellow-rumped warbler are some of the many birds found in the subalpine zone.[72] Sprague Lake and Odessa Lake are two of the park's subalpine lakes.[72]
Located just a few miles to the northwest of Denver, Boulder is a college town nestled against the foothills of the Rocky Mountains. Boulder’s inhabitants are best known for their healthy lifestyles, and outdoor activities are plentiful in and around the city. Boulder Creek cuts straight through the town and is lined with walking and biking trails. The four-block pedestrian-friendly Pearl Street Mall features outdoor performers in all but the most inclement weather. A drive up Baseline Road on Flagstaff Mountains rewards visitors with spectacular views, and there are picnic areas and hiking trails to enjoy at the summit as well.
Dial (970) 586-1222 for a recorded message on the status of Trail Ridge Road. You may not know that our mountain makes its own weather, so it is not uncommon to have snow in July or August at the top of Trail Ridge Road. Such weather will only last for a few hours to a day, but if you are planning to cross over Trail Ridge Road, weather may hamper your travel. You also may find the road closed due to weather in early June and September/October.
In the shadow of Great Sand Dunes National Park and Pre­serve, the quirky town of Hooper sits atop a natural artesian hot spring, with water flowing year-round into the family-friendly Sand Dunes Pool. On the same property, The Greenhouse is an all-indoor, all-adult oasis with three small soaking tubs and a 10-by-75-foot zero-entry pool. The Greenhouse also has a 10-person sauna, indoor gardens and an onsite bar to help you stay even toastier. 

Brian and I descended back to ~7,000 feet for dinner in a small-town Indian restaurant in Nederland, Colorado, west of Boulder. By then, both our heads ached like a bad hangover, and my lungs literally burned when I tried to inhale anything but shallow breaths. Add generalized joint pain, and I had a full-blown case of altitude sickness. Given that I am a noted hypochondriac, I expected the worst. 
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