3 miles and my feet feel great! It was a great day for it--high of 74 but 67 when I ran--record breaking temps in NH. Have only run in huaraches or Stems since October. I did do occasional gravel bucket training over the winter--10 to 30 minutes every week or two. This was in small pea stone gravel. My pads were starting to feel a bit thinner so I switched to large sharp gravel for my last session. I only did 5 minutes of standing about but my foot pads really seemed to respond with more thickness. I didn't try to quantify that though so it could be my imagination.