The ninth annual OTR 5k run/walk kicks off summer in the city a little early. The race begins and ends in Washington Park, with a course that takes you through historic Over-the-Rhine. Dogs and strollers welcome. Register online or in person. 10 a.m.; afterparty celebration until 4 p.m. Saturday. $30. Washington Park, 1230 Elm St., Over-the-Rhine, otrchamber.com.