Ran a 15K tempo run on the track (37.5 laps) at approximately marathon pace (~3:38/km or 5:51 pace). I took my split times at each mile (1600m to be exact). Thinking about it now, I should have split my watch at each kilometer since that is what will be marked in Rotterdam, just like in any other European marathon. I did take a glance at each km of the mile though. I ran the 15K (9.3 miles) tempo in 54:22 (3:37/km or 5:50 pace). The cardio felt very controlled and comfortable, but the legs were heavy by the end of the run.
Splits for the run were:
54:22 (15k or 9.3M)