[Scott Johnston]

@jenb

Welcome to the world of mountain running.  You have figured out that it is not as simple as training for road running.  One of the reasons we suggest tracking distance, vertical and most importantly HOURS.  A 15km run on rolling terrain and good footing is a very different animal than a muddy 15km on rough trails with 900m of vert.  One of the difficulties of training for mountain running is that you must train for these extremes and everything in between.  you might want read this article https://evokeendurance.com/resources/training-for-mountain-running/

I suggest the Luke Nelson plan.

Scott