That sounds roughly right for 100K distance ultras. The 100K training plans in Powell’s Relentless Forward Progress and Koerner’s Field Guide to Ultrarunning both have multiple ~25-mile long runs and one ~30-mile long run. For 100-milers, you’re probably looking at a 50-miler as your longest training run. (My experience caps out at a ~43 miler.)
I’m curious what UA’s take is on what is considered the minimum amount of ultra-specific training runs prior to a race of 100k or longer. It’s my understanding that there’s a point of physiological diminishing returns after 3 to 3.5 hours of running and that going longer is mostly a matter of testing fueling, gear, and mental training. For me 3 hours amounts to about 14 miles and 3600’. Would performing 3-4 big weekends of something like a 50k run or a back to back runs like 25/20 in the specific period be adequate for a 100k+ ultra? Then maintain solid conditioning with 5-7 hrs of volume on weekdays and a 3-3.5 hr long run on between weeks?
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