Want to run insanely long distances in the midst of a Texas summer? Well, here's your race! The Habanero Hundred offers a 50K, a 100K and a 100 mile, plus a 100K and 100 mile 5-person relay option if you have four friends as crazy as you. The race kicks off at high noon and has a 30 hour cutoff time.
Organizers realize the dangers of running in such heat and have lots of advice for pre-race prep on their website. Plus, the loops are short, meaning you are always less than 4 miles from an aid station.