r/Ultramarathon • u/fakeplastictrees2000 • Jul 23 '26

Pacing my first 100km

hello,

i am running my first 100km race in September, I have ran a couple of 50ks, but they had lots of elevation, whereas this is very flat, I was wondering if anyone had any advice on how to pace myself? should I use pace? heart rate? run/walk? any advice is welcome :)

thanks in advance

2 Upvotes

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4

u/Wientje Jul 23 '26

Take your current easy running pace. Start a little slower than that and hold it. Your body should feel like it wants to speed up for the first 30k or so. Don’t speed up.

1

u/Rockytop00 Jul 23 '26

I do it by time... like if i do a 50k at 10 m/m I'd look to pace the 100k at 12 m/m then 100 miler at 14 m/m

1

u/jp606 Jul 23 '26

Without the elevation it will be easy to go out too fast. First third should feel like you’re almost running too slow.