I've looked into this star trail photography stuff for another challenge. I think that my battery wouldn't last long enough for some proper 8 to 10 hour trails.
I guess that this is about 60 minutes?
oh wow - i like this - one of my favorites so far, this just is so not like where I live and it appeals very much to me, a very nice image to look at, my only preference would be a little lighter near the bottom middle (valley) though it may be too dark on my monitor, meets the challenge - good work :)