The first to the finish line doesn’t win today’s Dirty Snowflake Prediction Run. The key to winning the race is to know how long it’ll take you to finish the 4-mile loop out at the Cuyahoga Valley National Park’s Ledges Shelter in Peninsula. You’re not allowed to bring a watch or GPS so leave them at home. Registration costs $30 in advance, $35 on the day of the race. The run starts at 10 a.m. (Niesel)