If you're looking to get away from a cold winter up north, head down to Austin for a very decent race in mid February with temperature in the 50's. I've ran this race both in 2012 and 2013. The half marathon takes place on the same date as the marathon. Both races start at the same time and around mile 11 they split.

The course is fair. Neither flat nor hilly. Although it has a decent (long and steep) hill near mile 11 than once you're over it's all downhill to the finish line. The course starts and ends at the State Capitol and if you get early enough you park on the street a few blocks east of the start near I-35.

I enjoyed the fact that there were no corrals, giving you that feeling of a small not enough race even though it has 10,000+ runners. Technically, you can still show up 10 min before the start and find a spot on the starting line!