It was not exactly a surprise today to hear that Sarah Palin is not running for the Republican nomination this fall. She's pretty busy with other stuff.
But her running seems to be doing just fine, with her 1:46:10 half marathon performance in Iowa over Labor Day weekend under her maiden name, Sarah Heath. By my general rule of thumb, take that time and multiply by 2.1 and with some decent training she can run a a 3 hour, 43 minute marathon. Her personal best is a 3:59:36 at Humpy's (odd name) Marathon in Anchorage, Alaska on August 21, 2005.
Palin is 47 years old. Her qualifying time for the 2013 Boston Marathon (2012 registration has passed) will be 3 hours, 55 minutes. Come on Sarah, let's see you go for it! You definitely have it in you.
More on Palin's running background in this August 2009 Runner's World article.