Downtown Sudbury is no great shakes from a running perspective. If at one of the downtown hotels or at the Conference Centre, the best bet for running is a couple of easy trails just north of downtown, which can be combined for a ~10 km off-road run. The dirt surfaced trails are mainly wooded and have decent footing.

Start at the unnamed trail that comes right off Mountain St. just east of Highway 80. Run north to the train track and then back, for a 3.2 km out & back. Then, take Mountain St. north for 1 km to a second trail that heads north to the New Sudbury Conservation Area, which involves an 80m climb to a nice viewpoint. Continue on the trail to the end at Dublin St. This is a 6 km out and back.