Flynn's Beach Run is an annual community event in Port Aransas, Texas, typically held in late October as part of the "Beachtober" festivities. The run features a 5K and a 10K course set directly on the wide, sandy shores of Mustang Island, offering participants a unique racing experience alongside the Gulf of Mexico. While specific 2026 registration details are usually finalized closer to the fall, the event traditionally starts and ends at Horace Caldwell Pier, inviting runners of all ages and skill levels to enjoy the coastal scenery while supporting local nature preservation and community initiatives.