Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Black Hawk was a named passenger train operated by the Chicago, Burlington and Quincy Railroad between Chicago, Illinois, and Minneapolis/St. Paul, Minnesota. The train operated on an overnight schedule, being the nighttime counterpart to the Twin Zephyrs. It was a competitor in the Chicago-Twin Cities overnight train market to the Pioneer Limited of the Milwaukee Road and the North Western Limited of the Chicago and North Western.