You really can forget your race bib on the top of your dresser. No one thinks you need to be stopped from running 20 kilometers around White Rock Lake at 7 a.m. on a Saturday. Trimming your toenails before a race is not optional, no matter how recently you last did it. I don’t know about the psychological stamina of the runners at the front of the pack, but at the back of the pack, people get creative. Don’t judge the Brooklyn 2016 T-shirt guy and his whoops and hollers all for himself, because he might manage to finish the race when you do. On a humid September morning, the still air can nearly suffocate you while a breeze off the lake can give you chill bumps. Take a cue from the kids. When you’re done running, skip the lawn party and head straight for the frog fountain.