The Hillsborough Harriers youth cross-country club is accepting runners in grades three through eight for its 5K winter training series. The series consists of five 5K races between January and April in the Tampa Bay area. Weekly workouts for the series are on Tuesday, Thursday and Saturday in the Lutz and Carrollwood area. The club currently has over 40 boys and girls runners, from beginners to some of the top age-group runners in the state. The boys team recently finished as the state’s top-ranked middle school cross country club team. Cost for the 5K series is $80 for new members. Registration includes a Harriers race uniform. For more information, visit HarriersXC.com.