When I was in the area, I saw this lovely bridge over the South Platte River, a vital natural resource for farmers in the Northern High Plains of Colorado. While placing this, some barn swallows dove at me but once I looked up after ducking, I saw that a small hawk was their real enemy here. You can pull off before getting on the bridge and there is a pedestrian/bikeway. Good luck! Want credit for FTF? Send me a message with a picture of you holding the cache I hid here.
No need to put on a swimsuit and dive in the river yourself, you can access it atop the bridge and stay dry. 