This morning I read a post of FaceBook that got me thinking about my 'next' running-related challenge.   The Ultra Marathon and the Ragnar Relay Series.   A year ago, I couldn't even put my head around these events. My race calendar for 2013 is filled with races that represent unique race experiences that look like I'll have "fun" doing (and satisfy my desire to collect awesome bling).   But what of the 'challenge'? What should I do?