Home › Events › Too Cold to Hold 5K, 10K & Half Marathon This event has passed. Too Cold to Hold 5K, 10K & Half Marathon Event Website > RSVP on Facebook > February 27, 2021 - The 25th Annual Too Cold to Hold 5K, 10K & Half Marathon. A flat, fast course with beautiful scenic views along the Trinity River. + Google Calendar+ iCal Export Details Date: February 27