Help logging run

Today i took a new route and ended up running cross country, up & down hills, jumping muddy puddles and basically having great fun.
My problem is my speed was approx 1mile/15 mins and i can only find a walking entry, it felt like a lot more effort (the first part of my journey was 4mph walk on a flat path).
If ths was a one-off I wouldn't worry but Im gonna do this again so would like to make sure im logging right.
Thanks