Water Tank Repeats

So we've been having some crazy, warm weather for our typically cold and wet winter. Temperatures sometimes reaching the low 60's.  Pretty crazy, huh?  One afternoon we decided to head to the water tank for a family work-out sesh we like to refer to as the water tank repeats.  From bottom to top, the gated road up to the tank is roughly 400 meters long.  After a warm-up jog to the top, we would begin our sprints at the gate with one girl waiting at the finish line and the other about 100 meters ahead of the start line.  It turned out to be a fun game for the girls, trying to beat Dadda and then cheering for Momma as I was always the last one to finish.  Our repeats were only 100-200 meters long, but man, pushing a stroller and a 20 lb baby up a mid-grade hill is tough!