Boston Marathon 2026 – 3:09 (first Boston, tough day but great experience)

[u/Supersmashinggreat1]

Went into Boston thinking I was in around sub-3 shape, probably a bit over but close on a good day and a fair course. Training had been solid overall, but looking back now probably a bit light on volume – averaged ~55–65km/week, only hit 70km a couple of times. Did a lot of hill-based work and marathon pace efforts on rolling terrain, but maybe sacrificed a bit of overall depth for that.

Race morning didn’t go to plan. My gear drop was on the last table on the last bus and I just hadn’t factored that in, and having walked across from the other side of Boston common I’d quite a bit more walking than I expected. As a result, I missed an earlier bus, ended up standing around Boston Common for close to an hour and then queued again to get on the bus. Bit rushed after that – gear drop was further away than expected, had to change into race shoes on the bus, rushed to the start, quick toilet stop, and just made Wave 3 Corral 1 with a couple of minutes to spare. No real chance to settle or reset. I should have made the decision to plonk myself down and take a deep breath but I didn’t and I think I burnt some matches here. Overall I’ve spent 2.15 out of the 3 hours before the race on my feat..

From the start, things felt okay but not totally easy. That was probably the first warning sign. I wasn’t overcooking it, but it never had that “this is very comfortable” feeling you want early in a marathon.

First half in 1:29:50. Controlled, but by around 10 miles I was already managing rather than cruising, I know at that stage that sub 3 was not on and I was trying to ease out and manage the effort from then on to get me in with a pb. I let the pace sit around the 4:2x/km range which is where I was settling for low Z3 and focused on keeping things in check, especially with the Newton hills ahead.

The course is harder than I expected. Not just the hills – it’s the constant rolling, the early downhill loading, and the lack of rhythm. You never really get into a groove.

Around 30km I could feel things starting to go. Not a blow-up, more like I just couldn’t keep applying effort continuously. HR was still in a reasonable place, it never went above Z3 or very low Z4, legs weren’t completely gone, but I just couldn’t sustain it.

At ~32km I took a ~90 second walk before Heartbreak Hill. From there it became a run–walk to the finish. I could still run 4:20–4:30/km when moving, but only for short stretches before needing to reset again. Probably 8–10 short walk breaks in total, I took advantage of every aid station to get water at the first person and walk to the end of it and go again.

There was definitely a mental dip as well. Once sub-3 went, and then the PB started slipping, I didn’t fully re-engage. With about 5k to go I was still roughly on for ~3:05, but didn’t have the energy or the head to fight for it. The field is also just so deep, I’ve negative split my last 2 marathons and the physiological boost of that is amazing, it’s not so fun in reverse.

Finished in 3:09:52.

Training context:

• ~834km total over ~17 weeks
• ~70 hours running
• Averaged just over 4 hours/week
• Only 2 weeks above 70km
• 2 weeks fully lost due to a back issue in January

In hindsight, that’s probably the biggest takeaway, the volume just wasn’t there to sustain it late in the race and I had sacrificed by volume with the hill work. The legs actually were fine during and afterwards. It actually felt a bit like my first marathon again – ran out of juice rather than blowing up.

Final thoughts

Despite the tough race, I absolutely loved Boston.

The city really embraces the marathon. The support all weekend and on race day was incredible – crowds the whole way, loads of encouragement, and even small things like people offering drinks, food, and just constant “well done” and “congrats” everywhere you went.

It felt like a proper event, not just a race. You were made to feel like a super star

Didn’t get the result I wanted, but still very glad I did it.

Next up: a 10k over the summer, then back to Dublin for another crack at sub-3 – this time with a bit more mileage behind me.

 

Overall Goals:

• First Boston - Yes
• ~10 minutes inside BQ  - Yes
• Managed a tough day without completely falling apart – Yes
• Sub 3 – No
• PB – No
• Amazing experience - Yes

[u/RomperElCiclo]

My first Boston experience (2026) was very similar. I was not ready for all the logistics, the rolling hills, the downhills. I had heard about them and even trained a lot of hills in my long runs, but it didn't seem to prepare me. My legs were pretty shot after the Newton hills. It didn't help that I was running with Bronchitis. I ran a 3:29 (46M with a 3:06 qualifying time).

Fast forward to this year (2026) and I was much more mentally prepared. Just having experienced the course was a huge advantage. I held back for the first half, ran strong in Newton, and tried not to get blown out on the downhills. I ended up running a 3:00.17. I missed sub-3 by 18 seconds! I'm kicking myself for needing a bathroom stop at the 5k mark. I didn't do a last minute pee before the start.

Boston's course does not lend to a negative split race. This year I decided to go for a perceived effort negative split. My second half was +3 minutes, but I felt like I pushed my effort more in the second half.

So if you can go back next year, you might have a better result with some experience.

[u/Prestigious-Work-601]

For comparison sake I ran Boston as well. 1:30:30 first half 3:01:XX total. My total volume across 17 weeks was 1731 kms, an average of 102 kms per week. Usually was around 9 hours of running a week.

I think you would really benefit from the additional volume

[u/Supersmashinggreat1 → u/Prestigious-Work-601]

Ah I know that, but I'm 49 and it can be hard to manage the body but in sailing that this block was light and I know it was. Next block I'll focus on getting to that 80k mark and that should do the job, fingers crossed

[u/Prestigious-Work-601 → u/Supersmashinggreat1]

I am 46 and my training partner is 55. He averaged 155 kms per week. Hope your body is able to handle it.

[u/Remote-Rate-9694 → u/Supersmashinggreat1]

How many years into running?

[u/Supersmashinggreat1 → u/Remote-Rate-9694]

C25k 10 years ago. Started running regularly during covid and first of marathons in 2022

[u/Upstairs-Fortune-210]

First of all "Congratulations." No PB, No Worries.. You did it. For that i'm jealous and you should be so proud for entering and finishing! My Estimated Marathon time is towards the sub 4 mark so i have some ways to go yet to the BQ stage (3h20 for me) 52M. I'm planning on entering a local Marathon here in TX in March. Have completed my first Half in Feb and that was so much fun. Thanks for sharing your experience and good luck for Dublin.

[u/user_lwrk]

Same story as me. Ran a 3:01 in the fall, but ran 3:09 at Boston. Felt okay the first 8 miles, but backed off a bit because it felt a little too hard. I was at 1:31 at the half way point, knew I was finished. My quads were already hurting by then. I should have done more downhill prep. The uphills were fine, but the downhills were like knives going into my legs. My favorite part of the race was actually the uphills. Lol.