Tackle advanced-level (Class IV) rapids like "Hell's Half Mile," "Slaughterhouse Falls" and "Entrance ... What is the best time to go whitewater rafting in Colorado? The whitewater rafting season ...

After you've admired the Grand Canyon from the hiking trails (or even from the air on a helicopter tour), enjoy a new vantage point on a Colorado ... and two-day whitewater rafting trips with ...