first long run

So this past Saturday was my first long run since August/September. I can't remember the exact date, but that run was around 8 or 9 miles. Saturday I ran almost 10 miles and felt pretty good. My legs definitely got a little tired toward the end.

The greatest part about that run was that I was able to do it with my cousin. He ran 15 in total for the day so I joined him after he had completed between 6 and 7 miles of his run. I think it is a good sign that I was able to do the 9+ miles, but a little unsettling that my legs were fairly tired at the end. How will I be able to tack on 16.2 miles to what I just did? Only time will tell.