Hannah Strom ran from Island Wharf down Front Street to Silvershell Beach on Sunday morning, surrounded by her brother and friends. The accomplishment is a major step in the Marion native’s long road back from severe injuries sustained last January in a horrific crash while traveling in Florida with the Holy Cross rowing team. At the end of her run, her father surprised her with a puppy. The Tabor Academy graduate plans to go back to the Worcester-based college and rejoin the rowing program.