TLDR: My first marathon was a 4:11 finish on a day that went sideways in ways I absolutely did not see coming. Not catastrophically sideways. Just the specific kind of sideways that nobody’s training plan covers. This is the post I wish I’d found before I showed up at that start line.
I crossed my first marathon finish line at 4:11. Not fast. Exactly what I was secretly hoping for without saying it out loud. My wife and all three girls were there. My 7-year-old had a neon green poster that said “GO DADDY GO” in letters so uneven they looked like a ransom note. My 4-year-old was completely asleep in the stroller. None of that is the part I want to talk about.
I want to talk about miles 18 to 22. About the thing that happened with my stomach. About the pair of socks I will never wear again. About the fact that I genuinely believed, somewhere around mile 20, that I had permanently broken my body and this was just how I was going to feel now.
Nobody told me about any of it.
The Training Plan Lied to Me (Not on Purpose)
I followed a 16-week plan, the same style of plan behind how I trained for a marathon with three kids the second time around. I hit most of my runs. I peaked somewhere around 38 miles in week 13 and then tapered like I was supposed to. On paper, I was prepared.
What the plan didn’t account for was that I was also lifting five days a week as part of my regular gym routine, playing hockey, working a full-time job, and had three daughters aged 4, 7, and 9 who did not care about my recovery windows. The plan assumed I was a runner. I was a runner who also did a lot of other things, and those other things were not in the spreadsheet.
Week 11 was the worst. I was running peak mileage, playing hockey twice that week, and lifting. By Thursday my legs felt like wet concrete. I ran my 18-miler on Saturday on legs that hadn’t recovered from anything in ten days. I knew I should drop the hockey. I didn’t. I paid for that call through weeks 12 and 13 with legs that never quite felt fresh again.
Here’s what I’d do differently: treat the training plan like it was designed for someone whose only job is running. It was. Then build backward from that and figure out what else you have to cut to make the load actually work for your life. I thought I could just stack everything. You can’t just stack everything.
The Gear Mistake I Made in Plain Sight
I wore socks I’d trained in all cycle. Great. Perfect. Exactly what everyone says to do. What I didn’t do was wear those socks on my longer runs at race effort.
My shorter runs were fine. 60, 90 minutes, no issues. But at mile 14, after three and a half hours on my feet, I felt a blister forming on the outside of my right pinky toe. Not painful enough to stop. Painful enough to make every step slightly worse than the last one for the entire back half of the race. By mile 23 that blister was doing more of my mental load than anything else.
Wool socks, specifically, are the answer. I’ve since switched to Darn Tough merino wool. I’ve run in them for 20-plus miles in training and nothing has happened. That’s the bar. Nothing happened. That’s what I’m asking of my socks at mile 22.
Also: the shorts I trained in were fine for 14 miles. They were not fine for 26.2. I didn’t discover this until around mile 15. The chafe was real, it was bad, and I now know exactly what to do about it (Body Glide, applied more aggressively than you think you need to). Apply it before you feel like you need it.
What Nobody Warned Me About Nutrition
I didn’t start training my gut until week 12. I had 16 weeks. I used exactly four of them to practice the thing that blew up my race.
Here’s what I thought: I’d taken gels on shorter runs and felt fine. I figured race day would be the same, just more of it. That is not how this works.
Your stomach at mile 18 of a marathon is not the same organ it is during a 90-minute training run. It’s been processing fuel under stress for nearly three hours. It’s been bounced around, it’s had a lot of blood redirected away from it to your legs, and it is now very opinionated about what you ask it to do. If you haven’t trained it specifically to take gels at race effort over long distances, it will let you know.
Miles 18 to 22 I was nauseous, bloated, and trying to figure out if I could make it to the next porta-potty before something worse happened. I made it. Barely. I finished the race slower than I planned because I couldn’t fuel properly in the back half.
Second cycle, I started gel practice at week 6. Every single long run, same gels I was going to use on race day, same timing (every 45 minutes), same everything. By week 14 my stomach had figured it out. Miles 18 to 22 in my second marathon were a completely different experience.
The specific gels I use are Maurten 100s. They’re not cheap. They work for me, which is the whole criteria. Practice with whatever you’re going to use on race day. The brand doesn’t matter. The practice does.
What Miles 18 to 22 Actually Feel Like
The wall is a thing. It’s also not exactly the thing everyone describes.
For me it wasn’t a sudden collapse. It was a slow negotiation. Around mile 18 I started doing math I didn’t want to do. Eight more miles. Which felt like a lot. I’d been running for over three hours. My legs were fine, honestly, because I had a decent strength base from lifting. My brain was the problem.
There’s a voice that shows up somewhere in that stretch that is very calm and very reasonable and suggests that maybe you could walk a little. Just through this water station. Just for thirty seconds. And that voice is not wrong that walking would feel better in the moment. It’s just that “in the moment” at mile 18 is not the goal. The goal is the finish line, which is a different calculation.
What I’ve learned is that miles 18 to 22 are a negotiation you have to win on terms you decided before the race. I told myself before I started that I would only walk through water stations. That’s it. Everything else was running. When the calm reasonable voice showed up at mile 20, I had an answer already. It wasn’t willpower in the moment. It was a policy I’d already made.
That said: mile 20 I ate something I shouldn’t have at an aid station (a random gel I’d never tried before, because I was running low on my own). My stomach staged a small protest for the next two miles. See the previous section. Stick to what you practiced.
The Logistics I Got Wrong and They’re Embarrassing
I parked 1.2 miles from the start line and didn’t account for the walk in my warmup. I arrived with exactly enough time to find my corral and nothing else. No warmup, no bathroom stop, no time to mentally settle. I had to stop at a porta-potty at mile 2, which is a great way to lose two minutes and completely break whatever rhythm you had going.
Get there early enough to be bored. That’s the target. Bored, warmed up, and in your corral with time to spare. I was none of those things.
I also wore a throwaway layer to the start that I couldn’t get off easily once I warmed up. Just a ratty long-sleeve shirt I planned to toss at mile 1. Except I hadn’t practiced taking it off while running and the bib safety pins were through the shirt and getting it off without stopping took about 90 seconds of awkward fumbling I did not need at mile 1 of a marathon.
Practice your start line routine in training. It sounds absurd. Do it anyway.
The other logistics thing: I didn’t know my final corral number until the day before the race, and my phone battery was at 40% by the time I reached the start because I’d been using GPS and music since I parked. Bring a portable charger. Or charge your watch separately from your phone. Just make sure the thing you’re relying on for pace data isn’t going to die at mile 18.
What I’d Do Exactly the Same
I did my long runs slow. Really slow. I thought I was going too slow. I wasn’t. That was the right call and it’s the reason my legs held up as well as they did.
I got my 20-miler in. Twice, actually, with about ten days between them. Some plans cap at 18 or 20 and call it good. I wanted to know what 20 miles felt like. Not so I could bank confidence, exactly, but so race day didn’t feel like a distance I’d never seen before. Getting to mile 20 and knowing “I’ve been here, this is familiar” is worth something.
I talked to my wife before week one, not during week nine when I was asking her to cover Saturday mornings indefinitely. We agreed on the long run slot, we agreed I’d be actually present after the long runs instead of occupying the couch like a zombie, and the whole thing ran smoother for having been negotiated upfront. If you have a partner and you haven’t had that conversation yet, have it now. Not mid-cycle. Now.
And I finished. Which sounds like a low bar but it’s not. I’ve talked to enough first-time marathoners who didn’t finish, or who got injured in week 14, or who got sick in taper week and missed the race, to know that finishing a first marathon means a lot actually went right. For all my mistakes, the ones I made were survivable. I’ll take it.
The Post I Wish I’d Found
The posts I found before my first marathon were full of advice I already knew. Train consistently. Build your long run slowly. Don’t try anything new on race day.
What I actually needed was someone telling me that my stomach would try to ruin mile 18 if I hadn’t been practicing with gels since week 6. That the socks I wore for 90 minutes would feel completely different at hour four. That the voice that shows up at mile 20 is not reality, it’s just load, and you can have an answer ready for it before you get there.
That the math worked. That 4:11 was a real time I ran with my own legs in a real city with three kids waiting at the finish line with a neon green poster.
If you’re getting ready for your first one: figure out your nutrition protocol this week. Not in week 12. This week. Train your gut the same way you train your legs, on a schedule, with the same products you’re going to use on race day. That alone is the thing that would’ve changed my first marathon the most. If your first race is a half instead of a full, my 6-week half marathon plan builds the same nutrition practice in from week one.
The rest I’ll figure out on race three.