What is the minimum age to participate in the Santa Barbara Wine Country Half Marathon? Randy December 30, 2018 19:26 Participants must be 13 years old on race day to participate in the Santa Barbara Wine Country Half Marathon. Related articles What is the schedule for the Santa Barbara Wine Country Half Marathon? How do I get to the start line? What are the pace groups? How do I get from the finish line back to my car? Where can I find a course map?