I updated this post with some comparison info to the normal 25k loop course per Wayne's request. Take a look as it does add some interesting data.
Take a close look at the summary and note that we were out for 3:53:34 with a total stopped time of 1:58:43, that pretty much sums up the event. My Garmin said we went 9.3 miles but when I synced it in SportTracks it jumped up to 9.9 miles, so we probably went a little over 10 miles as I forgot to turn it on at the start (you can see the gap from the start to the finish). We were in areas of the park that I have never seen before nor would be able to find again.
Afton FatAss Summary
Afton 2010 25k Loop Summary
Did you notice how the elevation summaries are similar in climb even though the mileage is markedly different?
Afton 2011 FatAss course
Afton 2010 25k Loop Course
Afton FatAss Loop
Afton 25k Loop
What a lot of fun, the aid stations, the company, the trails and the pot luck afterward were all great. My pictures didn't turn out, hopefully some of the others who took pictures post them. As for me, I plan to do this event every year (or at least those years that we don't have snow :-).