Who needs all the bells and whistles? Economy cars are the most popular rental car category for visitors to Colorado, and for good reason. You'll experience terrific fuel economy as you navigate the streets of Denver and Colorado Springs in this small vehicle. They're agile, a cinch to park, and most importantly, easy on your bank balance.Of course, you can't check out Colorado without exploring a few of its natural beauty spots. Head out on a road trip around alpine meadows and mountains from the comfort of something bigger, like a full-size car. Load up your passengers and whatever else you need to take — these models offer plenty of space for your gear without compromising on room.