Another 6.5m acw lap of thruscross, starting and finishing 1 mile back down the valley below the dam. I went too fast for true threshold pace I think, but no cramping. Two runs in a row now the supertracs have let me down, this time not on rocks, but on a slippy contour. I remember when I could really take this route by the scruff of the neck, and run hard; it feels like a huge effort now.