Saturday late morning/early afternoon (February 25, 2017) I spent a couple of hours at Fischer Park concentrating on hill work.  I covered 6.15 miles the majority of which was in segments of  approximately 1/4 mile during which I went from the highest point in the park down to the lowest, and back up again.  This portion of the elevation graph for the hike illustrates the hill repetitions:

My GPS unit recorded a total ascent of 1,276 feet during the hike.  While I wish the elevation of each unit was greater, I felt good about this training effort, and I plan to do this several times a week.  It is close to home and convenient.  I hope to hike natural trails a couple of times per week so that my miles are not all the same.