Out to the Soesterduinen. Followed a strange flat trail in the sand, about 2 foot wide, wondering if I'd ever catch up with whatever had made it. It led me round the edge of the sandy area to the hilly bits at the edge of the woods on the other side where it then went up and down the hills. Must have been some sort of a sledge with a flat underside. Did another 6minute-circuit but only got 6.10 this time. This was after about an hour's running and it was warmer than it was this morning. Ah well, at least got my speed up briefly from my normal plodding pace. Though as most of it is over sand it must still be doing my legs some good. And the hilly bits were murderous.