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]
The best time to visit Rocky Mountain National Park is from June to September when the snow is (mostly) melted and the hiking trails and attractions are accessible. Still, these four months are also the most popular times to visit, so if you'd rather experience RMNP in relative isolation and while wearing snowshoes or cross-country skis, visit between the months of October and May. Whether snow or sunshine, the park is open to the public 24 hours a day, 365 days a year, though some parts may be inaccessible.
Getting to Ouray is a spectacular adventure in itself, especially if you take the Million Dollar Highway that follows a 25-mile stretch of US 550 from Silverton to get here. The road’s endless twists and turns, many at the edge of sheer cliffs, brings some of the most jaw-dropping vistas in the world. As you turn each corner, the views of the soaring, jagged peaks of the San Juan Mountains seem to keep getting better – providing a pretty big clue as to why Ouray is often called the “Switzerland of America.” It’s an ideal spot for soaking in natural hot springs, gazing at countless waterfalls, and even exploring old mines. For an in-depth knowledge of the town’s gold and silver history, head to Bachelor-Syracuse Mine where you’ll find out what it was like to be a miner back in the day. There are also lots of interesting shops on the main street, historic walking tours and even a ghost tour if you’re brave enough.
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.
