<a href="http://www.oc100k.com/" target="_blank">http://www.oc100k.com/</a> - right there on the entrants list<br><br>
I'm just a 26.2 guy, but I know this course very well and run it regularly. It's 10K out and back on a bike path - repeated 5 or 10 times for 50K or 100K.<br><br>
In a world of epic mountian and trail ultras, it seems odd to me. Perhaps she's looking for a fast time, in which case it would make sense.