Rather than derail the running thread over and over, here's a new place to discuss all things pertaining to Ultra-Endurance Sports, whether it be running, swimming, cycling, or all three...
Good question. I could have finished a 100K, but 100M would have been a whole different strategy and not sure I'd make that without quite a bit more training. I would consider doing another 50M or 100K in the future. I have a tough 50K coming up in July. Temp and course are tough. Another 50K in the fall. Will see if any ultras line up with eithe of those to use as a training run.
Some ultra discussion would be interesting but probably need another thread for it. I learned quite a bit in my last two and could stand to learn and share some more.
I've also been struggling with this same issue... I signed up for a 100k race last May, but had to drop out due to an overuse injury from training too much. Finding the balance between doing enough and overdoing it is quite a challenge.
That's partly why I'm taking it fairly easy at the moment. The only running race I've signed up for yet this year is the Golden Gate Relay (a 12-person relay covering 192 miles (I ran a total of 17.6 miles during the race last year)). I'm also planning to do a half Ironman in August, and possibly a marathon in December. There's an outside chance that I will sign up for another 50 miler late in the season, but finding a Western States qualifier that works with my cycling schedule is a challenge.
Ultraman Florida is the end goal of the current training cycle. It's in February, so almost a year away. My aim is to go considerably faster there than in previous goes at that distance.