The caravan grew as we proceeded north into Iowa. 3985 passed a northbound train here, which can barely been seen in the distance.

Just a few miles north of Trenton, 3985 quickly gets up to track speed on the single track Spine Line.

The latest in diesel superpower passes one of the surviving examples of steam superpower. A crewmember is hanging off the walkway taking a picture as his train rolls past the 3985.