Mid D Guy wrote:
If the 4-miler was the Japan run, your splits look fine to me.
Mile 3 has three pretty tough hills, and a net elevation gain of 60 feet. Mile 4 is a 70 feet downhill. A difference of 30-40 seconds between mile 3 and mile 4 is about average.
As a matter of fact it was! 30-40 sec seems massive. I was looking at other people's splits and the difference in splits was more like 10-15s bw mile 3 & 4. That's comforting to hear though, thanks.