A last minute plug for a great little event: The UofT Triathlon Club is hosting their annual Swim, Row & Go Triathlon this Sunday, Jan 29th. There are still a few spots left in the race. You could battle the windchill on your Sunday morning long run, or you could be at UofT, working up a sweat with a great group of triathletes in a warmer environment (and still do your long run later, if you're so inclined).
This might be the only triathlon you do this year that doesn't require you to bring a bike. Just pack a backpack with swim gear, shoes, t-shirt and shorts, and take the subway to the St George station. Walk south on St George St., turn west on Harbord and you're there. More info available here.