[Archaea]

Starts with an H, I'll remember it but it's basically fairly easy. Pick an A race in the future, two B races to lead up to it, and three Cs interspersed.

Now, pick local ten ks.

Increase ten percent per week.

Start with a tempo day at ten k pace, an interval day with rolling two hundreds, four hundreds, eight hundred twelve hundreds and repeate miles over a period.

And have a long day.

For you I'd pick a good half marathon.