When I started participating in The Distance Derby I had to figure out some way to start tracking miles. I had never thought about how far we were actually riding until I started playing the game. I tried using the Garmin etrex but decided since I was already carrying my phone that I really did not need to carry an additional tool when the one I had in my pocket could do the job just the same.
I experimented with several different apps. I tried equitrail, endomondo and map my tracks. I finally settled on EquiTrack as my app of choice for this task.
AND I love it. From what I can tell it is incredibly accurate, records a variety data and is not a huge suck on my battery life. I also love that I can load all my horses and it keeps their statistics both separately and cumulatively.
So if you are looking for a way to quantitatively count those rides…this is a method I recommend.