Which Ottawa winter festival, held along the Rideau Canal, features ice sculpture competitions and the world's largest naturally frozen skating rink?

• A Carnaval de Quebec
• B Winterlude ✓
• C Festival du Voyageur
• D Ice on Whyte

Winterlude, launched in 1979, is Ottawa's flagship winter festival centred on the Rideau Canal Skateway, a 7.8-kilometre ice surface on the Rideau Canal, itself a UNESCO World Heritage site.