You have seven days to decide if you're up to running Pikes Peak. Registration for the Pikes Peak Ascent and Marathon begins Thursday, March 1, at 8 a.m. on active.com. You can find a link to it at http://www.pikespeakmarathon.org/. It fills up fast. Last year it took about 9 hours. This year it could go faster. There are big cash prizes!