Olivia Chow, Doug Ford and John Tory each arrived at the food bank for 10 a.m. on Monday. Ari Goldkind tweeted that he would be helping out at the food bank later in the day.
Participation in the sorting at the food bank was just the first of several confirmed events involving high-profile mayoral candidates, on a day of holiday campaigning just two weeks ahead of the Oct. 27 election.
In the early afternoon, Chow is due to speak to reporters downtown, while Tory is expected to be publicly endorsed by Lisa Raitt, the federal transport minister and MP for Halton.
Ford will celebrate Thanksgiving with members of his campaign team on Monday afternoon.
Toronto voters can begin casting ballots as soon as Tuesday, when advance voting begins in all 44 wards across the city.