Burritos were a bad idea.

I knew it the moment I set foot on the trail, and halfway through my hike, I was seriously regretting my decision. But what can I say? I’d been kicking ass in my marathon training, and I hadn’t had anything that didn’t smell like carrots in the last six weeks.

So I celebrated. But thirty minutes later, I was not celebrating.

I knew there was no way I could make it back to the car in my current condition. I needed to go to the bathroom. The problem was, the...