Ouch!

OUCH ! OUCH ! OUCH!
So 15 miles (Ascot and back). More hill than I thought and felt like they were all up !
Passed the 500km mark since I started, took just over 5 miuntes off half marathon pace and 4 minutes better than my last 15 miles! But felt like s**t - really hard!!! Ouch! Ouch! Ouch!