Is a 10-day taper good enough?

This sounds about right. Drop mileage over 3 weeks (I aimed for 60% of previous mileage, then 35-30%, then 20-25% during race week not including the race). Still a big taper, but without taking too much time off. Last big workout 10-14 days out.

I'm aiming for an Oct 16 marathon, too. Columbus or Detroit, almost certainly going to be Columbus. My taper is always three weeks with week 1 cutting to about 80% of highest mileage, week 2 cut to 60%, week 3 cut to a maximum of 40% not counting the race. Final week is always run the way I feel. I usually do less than planned, more like about 30-35%.

My taper has always worked well for me. Last marathon I ran a HM in 1:36 three weeks out, a 10-miler in 1:10 two weeks out, a 5K in 20:41 a week out, and then a 2:59 flat marathon. The first three races were at about 5,000' of altitude, marathon at sea level.

Three weeks out - 7:19 pace for 13.1 miles (Legs completely dead)

Two weeks out - 7:00 pace for 10 miles (Legs starting to feel better)

One week out - 6:39 pace for 3.1 miles (Legs feeling mostly recovered)

Marathon - 6:49 pace for 26.2 miles

Those are fast times. I'm just looking to finish lol

My best is 3:20:01 and it would have been a 3:15 had I paced with my head and not my d!ck ;)

Yes it is plenty. Skip/shorten the long run 14 days out and start a taper 10 days out. Unless you are overtrained you can peak just as well this way.

Thank you! This fitness block is just about getting a base, staying healthy, and seeing what my natural ability (or lack thereof) and experience can do with it.

I think I got hurt in the past year because I did those speed workouts and track workouts. When I stick to just tempos at goal pace or progressions, or simple strides, I'm able to complete mileage blocks without a problem (2019). I should add in some hills from time to time.

A 10 day taper is what I usually use. Maybe a day or 2 less, or a couple more days off if I was training hard for a goal marathon. It seems to work well for me.