Do we have any half marathon runners out here? Search for 2015 half marathons in Florida at the Halfmarathonsearch.com Half Marathon Calendar USA. This is a fantastic simplistic up to date listing of half marathons in Florida, with other great running resources to browse through as well! The half marathon calendar is already starting to post 2016 half marathons as well! Florida currently has over 130 half marathons to choose from! Find your next Miami half marathon!