Southborough- Fit Studio 28 of Westborough will host a 5K run/walk to benefit the One Fund, the charity created for victims of the Boston Marathon bombing and their families, Sunday, June 9 at 9 a.m. at the Trottier Middle School, 49 Parkerville Road. Registration begins at 7 a.m. The cost is $25. The event will feature an auction of mural paintings sponsored by the Bigelow Center for the Arts and Southborough Recreations. To register, visit www.RunReg.com. For more information, contact Leah Ammon at [email protected].