Outdoor skating loops have become a trend in Ontario, starting (I think) with the very popular 1.3 km loop at Arrowhead Provincial Park north of Huntsville.
The ultimate is the Rideau Canal Skateway in Ottawa, almost 8 km long. You have to be lucky enough to time it right with the weather but it's an amazing experience. You can stop and buy lunch on the way. I know people who have commuted to work on the canal.