Registration for “runnin’ scared,” a 5K, 1K and toddler trot hosted by San Dimas at Civic Center Park, 245 E. Bonita Ave., opens at 6:30 a.m. Saturday, September 27. Fees are $40 for the 5K at 7:30, $30 for the 1K walk at 9; and $15 trot at 9:30. Costumes are welcome. Register ahead online at sandimasca.gov.