Precambrian metamorphic rock formed the core of the North American continent during the Precambrian eon 4.5–1 billion years ago. During the Paleozoic era, western North America was submerged beneath a shallow sea, with a seabed composed of limestone and dolomite deposits many kilometers thick.[54] Pikes Peak granite formed during the late Precambrian eon, continuing well into the Paleozoic era, when mass quantities of molten rock flowed, amalgamated, and formed the continents about 1 billion–300 million years ago. Concurrently, in the period from 500–300 million years ago, the region began to sink while lime and mud sediments were deposited in the vacated space. Eroded granite produced sand particles that formed strata—layers of sediment—in the sinking basin.[55]
Lawn Lake Trail climbs to Lawn Lake and Crystal Lake, one of the parks deepest lakes, in the alpine ecosystem and along the course of the Roaring River. The river shows the massive damage caused by a dam failure in 1982 that claimed the lives of three campers. The trail is a strenuous snowshoe hike in the winter.[42] Ypsilon Lake Trail leads to its namesake as well as Chipmunk Lake, with views of Longs Peak, while traversing pine forests with grouseberry and bearberry bushes. The trail also offers views of the canyon gouged out by rampaging water that broke loose from Lawn Lake Dam in 1982. Visible is the south face of Ypsilon Mountain, with its Y shaped gash rising sharply from the shoreline.[42]
Surrounded by over 100,000 acres of the Pike National Forest, the Ranch at Emerald Valley is an unmatched, all-inclusive retreat that combines the rustic charm of a wilderness enclave with The Broadmoor’s incomparable luxury and service. Honeymooners can indulge in one of 10 beautifully appointed cabins, featuring gas fireplaces, rich furnishings, and modern amenities. Couples can spend their days fly fishing in pristine mountain lakes, hiking and biking along scenic trails or exploring the mountains on horseback. Afterward, unwind by soaking in an outdoor hot tub and sipping fine wine on a panoramic terrace while enjoying the beauty of a Rocky Mountain sunset. All meals and ranch activities are included as part of the stay, making it an ideal setting for intimate getaways where every detail is thoughtfully handled.
The Experience: Everywhere you look in Aspen, the views will take your breath away, especially if you stay at the historic Hotel Jerome. It's the ultimate mountain resort town every time of year, with world-class shopping, delicious food spots, and, as we mentioned, gorgeous scenery. Ski in Snowmass or Highland Bowl. In the summer, try to plan your trip to attend the wine and food festival or the annual jazz festival. Catch a show at Belly Up, party on the mountain at Cloud Nine, eat at Matsuhisa, or cross-country ski to dinner at the remote Pine Creek Lodge.
Baker Pass crosses the Continental Divide through the Never Summer Mountains and into the Michigan River drainage to the west of Mount Nimbus[36]—a drainage that feeds streams and rivers that drain into the Gulf of Mexico.[28] Other mountain passes are La Poudre Pass and Thunder Pass, which was once used by stage coaches and is a route to Michigan Lakes. Little Yellowstone has geological features similar to the Grand Canyon of the Yellowstone. The Green Mountain trail once was a wagon road used to haul hay from Big Meadows. Flattop Mountain, which can be accessed from the eastern and western sides of the park, is near Green Mountain. Shadow Mountain Lookout—a wildfire observation tower—is on the National Register of Historic Places.[36] Paradise Park Natural Area is an essentially hidden and protected wild area with no maintained trails penetrating it.[39]
Take in the beautiful scenery of Colorado's Front Range, the gateway to Rocky Mountain National Park, as you zip through the trees! Just a 30-minute drive from downtown Denver lie three of Colorado’s longest zipline tracks. 6-line Zipline: Enjoy 4 hours of fresh air, scenic views and thrills on the 6-line zipline in the Rocky Mountains. Ride on six lines that range from 850 feet (259 m) to 1,900 feet (579 m). Soar through the treetops and experience three of Colorado’s longest ziplines! There is a 10-minute uphill hike between the first and second zipline and minimal walking between the others; above-average physical condition is recommended.
^  This article incorporates public domain material from the Library of Congress document: "Majestic view from the old, one-way, dirt Fall River Road in Rocky Mountain National Park in the Front Range of the spectacular and high Rockies in north-central Colorado". Library of Congress - Prints & Photographs Online Catalog. Retrieved October 28, 2016.

Update on Jan. 14, 2019: A Rocky Mountain National Park spokesman said Monday the park began using recreation fees to temporarily pay about 10 percent of furloughed workers to clean up the park. They’ve been plowing roads, cleaning restrooms and collecting trash since Saturday. Other staff, such as law enforcement rangers, continue to work without pay during the shutdown. The park is expected to reopen to vehicle traffic on Tuesday, said Kyle Patterson, a Park spokesman who is on furlough.
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