This is how fast I’ve managed to run over various distances, I still train believing that some of them are beatable and one of them, the 5k, was set very recently so you never know.

1 mile             5m35s

5km               18m53s

5 miles          30m27s

10km             38m44s

10 miles        1h08m29s

Half Mara    1h23m36s

Marathon     3h14m10s

50km             6h27m14s