Pittsburgh’s most hardcore trail run with the most risqué name is back for another year. The 3 Rivers Outdoor Company is offering runners the usual range of loops in Frick Park, including two, four, six, and eight mile runs — while the most intense or insane can choose to run the whole 20-mile “Mother Fricker.” Start times run throughout the morning and early afternoon, depending on which loop you run. All loops start and end at the big parking lot at the bottom of the park. Registration is not required and the run is not timed. Organizers just ask that runners bring at least one non-perishable food donation and one old running shoe in any condition — you’ll find out why there. The after party will be hosted at 3ROC with free beer for all race participants, as well as giveaways.