Five weeks out from Grindstone, the plan called for a three-hour long run. Not a race simulation, exactly. A systems check. The dress rehearsal comes late in the build for a reason. By that point the fitness is mostly built, and the thing you still don't know is whether your stomach will cooperate for three hours while you keep shoveling sugar into it.

I did not want to run it.

Thursday's easy run was bad in a way I couldn't explain. Not sore, not sick exactly. Just flattened. I got through it and then took an hour off work in the middle of the afternoon to lie down, which is not a thing I do. Moving it wasn't an option. The weekend was already spoken for, so it was Friday or it was nothing, and with five weeks left there isn't much nothing available.

Friday morning I woke up better. Not good. Better. Good enough to get dressed.

Up at 5:30. Bagel with strawberry jelly, roughly 67 grams of carbs. Coffee. An hour of sitting with it and a book before getting dressed.

First Maurten Gel 100 at 6:45, four minutes before I started running, which is less a pre-run gel than a starting-line gel.

In the vest: three 500ml soft flasks, two with water and one with Tailwind, plus a spare Tailwind packet. Four more regular Maurten gels and one Caf 100. The plan was a gel every thirty minutes, the caffeinated one at the ninety-minute mark, and a Tailwind packet every ninety minutes.

Shoes were the Saucony Peregrine 16, which is what I'll wear at Grindstone. That was the point. A dress rehearsal in your daily trainers is just a long run.

Out the door at 6:49. Seventy-one degrees, ninety-three percent humidity, which works out to a dew point right around sixty-nine. If you've never paid attention to dew point, that's the number that explains why some seventy-one degree mornings feel fine and others feel like running through a wet towel. This was the wet towel.

I felt bad immediately.

Not injured-bad. The Thursday feeling, still there. Hot within a mile, drained within two, doing the mental arithmetic that every runner does in that situation: how far can I get before this becomes a decision.

The splits don't show any of this. The first six miles averaged 7:50. That's the thing about feeling terrible at an easy effort. It rarely costs you anything early. It just sits there being unpleasant.

Around mile five, my stomach turned. Not dramatically. The specific quiet announcement that a decision is going to get made for you in the near future. I knew there were bathrooms at a park about two miles up. I have never been so interested in a park.

I made it. Mile seven took 10:58, which tells you roughly how long I was in there.

Here's the part I didn't expect. After the stop, and after refilling flasks, I felt substantially better. Not good. But the drained feeling backed off and the stomach went quiet.

Miles nine through twelve came in at 7:42, 7:55, 7:55, 7:52. That's the fastest stretch of the day, and it happened after the worst thirty minutes of the day.

I've had bad first hours before and treated them as verdicts. They usually aren't. A bad first hour is information about the first hour.

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At twelve, my legs started to go. Not cramping yet, just the specific heaviness where every step costs a little more than it should. I expected that to be the beginning of the end.

It wasn't. It faded. I refilled water again inside mile thirteen, and then found a rhythm that lasted six miles. Mile eighteen was 7:45, the third-fastest split of the day, and I remember thinking that I might get away with this.

Mile nineteen is where the calves started. Not a full cramp, the warning version. The one where you can feel the muscle deciding.

Somewhere before mile nineteen, a different problem showed up, and it's the one I care most about.

I got sick of the gels.

Not nauseated. Sick of them. The idea of one more sweet thing in my mouth became genuinely difficult. I got them all down, which I'm counting as a win, but the last one took some negotiating.

I had meant to bring a peanut butter and jelly sandwich to test alongside the gels. I forgot it on the counter.

That's the single most useful thing this run taught me, and I learned it by not doing it. Grindstone is going to take me somewhere north of six hours. If I'm this tired of sweet at three hours, I don't want to find out what hour five feels like with nothing but Maurten in the vest.

Mile twenty was 8:33, the slowest of the day. Mile twenty-one was 8:17, which is just what happens when a mile is the last one.

There was nothing left to learn in that stretch. The gels were gone, the calves had made their point, and the only remaining question was whether I'd cover the distance, which isn't really a question so much as arithmetic.

I ran it because it was the last mile and a half.

21.01 miles. 2:53:06. That's an 8:14 average including a bathroom stop and two water refills, about five and a half minutes of standing still.

The first six miles averaged 7:50. The last eight averaged 8:07. My slowest running mile was 8:33.

The difference between those two numbers is seventeen seconds. That's the entire fade from the start of the run to the end of it: I finished seventeen seconds a mile slower than I started.

Which is not much. A bad Thursday, a sixty-nine degree dew point, a stomach that quit at mile five, legs that went at twelve and again at nineteen, and the whole thing added up to seventeen seconds a mile.

It's the furthest I've run since my last marathon, ten years ago.

On the fueling side: 225 grams of carbohydrate during the run, roughly 78 grams an hour, all of it consumed and all of it stayed down. I had one GI episode at forty minutes and none after. That's not a failed fueling test. That's a fueling test that passed with a note in the margin.

Real food goes in the vest. The peanut butter and jelly is no longer optional. Sweet-only fueling has a shelf life and mine is apparently under three hours.

Caffeine stays. I've had a couple of GI episodes in hard sessions this block and caffeine was the obvious suspect. This run mostly clears it. My stomach turned at roughly forty minutes. The caffeinated gel wasn't scheduled until ninety. Whatever was happening, it happened before caffeine entered the picture.

The stop plan is real. Two water refills and a bathroom stop cost five and a half minutes across twenty-one miles. At Grindstone the aid stations will cost more than that, and I should stop pretending they won't.

Calves get attention. Twenty-one miles in the race shoe and they went at nineteen. Whether that's shoes, calves, or a bad week is genuinely unclear, and I'd rather find out in the next four weeks than at mile twenty-two of a 50k.

One hundred and forty-eight feet of climbing.

Grindstone has 5,020 over 32.5 miles. This run covered sixty-five percent of the distance and about three percent of the vertical, at a pace I will not see on race day and shouldn't try to.

So: the gut got rehearsed. The duration got rehearsed. The kit got rehearsed. The race did not.

That's what a flat state gets you. You can train almost everything except the thing the race is actually made of. I've made my peace with that, mostly, and I'll find out in five weeks how good a peace it was.

I'm still not one hundred percent this week. Better than Thursday. Not right.

There's one more three-hour run on the calendar before the taper. Same duration, same fuel plan, plus the peanut butter and jelly I left on the counter. If I show up to that one feeling like a person, I'll finally know how much of this was the run and how much of it was the week.

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