Javelina Jundred Jackass 31K
Not doable· 31 km, +355 m · 2.2–3.1 h on your feet · 1 wk easy running after
12 m of climb per km — rolling; you will run almost all of it.
Course, cutoffs and race-day guide
Only 4 weeks before it, where your build needs 12 (the generic figure is 16).
What would change this: if you have raced this distance before, say so under “your running” — an experienced runner needs a shorter build than the generic one; or a higher current weekly volume shortens the build this race needs; or a shorter distance at the same event, or a later edition.