The Long Winter.
Minnesotan winters tend to last approximately 13 months of the year. Temperatures drop from a lovely 5 degrees to the mildly cold -40 within hours. Let me tell you, hiking through a 20 degree drop in a day along with wind chill can make someone question many of their life decisions that brought them to that point. However, there are some positives that can come along from an experience like this. For example, I would never have gotten the opportunity to experience what mild hypothermia feels like, or how your hands and arms will stop working while your fingers are stuck in a fist until they can unthaw from the cold. Really makes you appreciate Prometheus and indoor heating.
All in all I did get an opportunity to get a few good photos from along one of the rivers as well as some from places along the way.