I must record the entire activity on my fitness device. I can take walking breaks, but the distance covered while running must be greater than 10 miles. I'm defining "running" as greater than 135 steps per minute.

I'm in my late twenties, 150 lbs. My partner and I are trying to do this together. We ran+walked 7 miles in the fall for a formal race. Running in the cold and dark is new for us, so we may have trouble with self-motivation. I'm not currently signed up for any formal footraces to fulfill this goal.