6. Monarch Pass
Crossing the Continental Divide at 11,375 feet, the original pass was established in 1880 and was only passable in the summer. The present-day Monarch Pass is along US 50 near the town of Salida. For an amazing view of the Sawatch Mountain Range now ablaze with color, take the Monarch Crest Scenic Tramway located in Salida, which allows pets.