What is the fine-grained topic of the following text: Portland’s Megan Cunningham, left, Steep Falls’ Delaney Hesler and Portland’s Annabelle Brooks, Sierra Aponte-Clarke and Hadley Poirier, members of the Casco Bay Cruzers running group, recently took part in the USATF Junior Olympics regional meet in Smithfield, Rhode Island, where they placed fifth to qualify for the national meet in Tallahassee, Florida next month. Only return the topic.
Casco Bay Cruzers running group's participation in the USATF Junior Olympics regional meet