Houston, it’s that time of year again. MARATHON TIME! I know because I volunteer for the Start Corridor Committee, and we had our meeting this coming weekend over 20,000 people will participate in the 5K, Half Marathon and Marathon. Houston’s Marathon has three great qualities: 1. it’s flat, 2.it’s fast and 3. it’s fun. Even with the big 3F’s for marathon running, training for this run can be difficult.