During the GORUCK Games back in April, one of the events was a 1 mile max effort while carrying 100lbs. Both the men and women participated in this event, and while it's very tough, and not something I would recommend someone do frequently, it's a really great challenge and a good way to test your grit - especially if you've never done anything like it.
I'm challenging you to try the 100lb mile. If you have an injury or something of the like, then by all means, don't do it. However, if you're in good health, give it a go! Leave your time in the comments! We'd love to hear how you did. This challenge isn't about getting the best time. There are people who will blow my 8:11 out of the water, and there are people who will take longer. It's all good. The goal is to test yourself by doing something difficult. Push yourself outside your comfort zone.