I have done 2 50k's and one 50 miler. I am planning on my first 100k in April, (the flatrock101). I prefer trail races, and I have aspirations to do some mountain ultras, but I live in Kansas. I want to do the Plain 100 , and the Bob Marshall open at some point. I have also done a few fast pack/ultra-light style over night through hikes on the Ozark and Ouachita trails. Not the whole trails, just out and backs. I like long bi-pedal travel. I wish I had the time to do more.
I did not start running, or even trying to be healthy, until I was 49. I have always been active, I am a carpenter and I hunt/fish/ etc.., but I had spent a lifetime drinking/smoking and eating everything. This has been a steep learning curve.