How long should I taper, and how much do I cut back?
A taper can stretch from one week to three depending on the race and the runner, and about two weeks is a safe rule of thumb. Drop to roughly 75% of your volume two weeks out, around 60 to 75% the week after, and 40 to 50% in race week. The race itself is a big slab of volume, so you will not run much before it. Hold a little race-specific intensity the whole way through, but pull the volume right back.