big running

I'm not sure where this desire to run for a really long time over large distances came from, but it's been at the back of my mind for a while. It peaks out occasionally when these new trail runs or races come up. Of course I'm not ready for a 50K or any kind of ultra - I need to do a marathon or the Wapack first. Maybe that will cure these fantasies, or maybe it won't go away until I've run a 100K or a really big trail run.