To many, Denver is the true gateway to the West. Sure, St. Louis may have an arch, but it also has 850 miles of Midwestern plains to contend with before the real West begins. And like so many early frontiersmen, who reached the western edge of the High Plains—where modern-day Denver is located—and gazed upon the Front Range in both terror and excitement, the Mile High City still, to this day, acts as the ultimate springboard for Colorado adventure. Plus, nothing beats a Colorado road trip.