IndyCar officials have dropped Edmonton from the 2011 schedule after a dispute between race promoters and city officials, but hope to add another Canadian event near Montreal.
New Zealand's Scott Dixon won the Edmonton race last July over a temporary circuit on an airport runway, but promoters and city leaders could not agree over who should cover $4 million in repaving and site upgrade costs.
IndyCar chief executive Randy Bernard told the Indianapolis Star that he was "optimistic" a replacement race could be formed in time for next season, looking at a return to Montreal.
Two Quebec sites, not the Formula One circuit, have been considered with Vancouver and Calgary also mentioned as possible locations.
The loss of Edmonton leaves IndyCar with a 16-race scheduled for 2011 but the planned concluding race, in Las Vegas, has yet to be officially confirmed.