She hasn’t won a marathon yet, but that could change on Nov. 6. The 29-year-old New Zealander, who trains in Providence, R.I., returns to the race where she finished fifth last year. Smith has had an up and down year, with her low point at the Boston Marathon in April, where she dropped out because of a calf injury after leading the first 18 miles. Her high was at the Rock ‘n’ Roll Philadelphia Half Marathon, where she set a U.S. all-comer’s record, winning the race in 1:07:11. Smith likes to race from the front, so the rest of the field won’t let her get too far ahead.