Frostbite 8K in Kannapolis, NC back in like 1998, 1999. It switched to a 5K year or two later. 11* F when I pulled into YMCA where race HQ was. Ran about 25min warmup (using race as a lo key tempo). Race start it had warmed to about 16, 17*F. Race started held us on the line to tell us about how great every sponsor was. Warm up was gone. Took half race to feel "warm." 26:18. Had wanted 5:15pace, so close enough. 25min cooldown wasn't bad. About 22, 23*F by then.