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The 22nd Annual
Ontario Ultra Series 2010,
Ontario Trail Series and 50k Challenge

updated August 31, 2010

The Ontario Ultra Series is a demanding 12 race series involving a wide variety of running courses throughout Ontario. Each event has its own unique character with a full range of environments and distances from trails and roads, to certified running tracks. 

The Trail Series is a 9-race series consisting of events of length 25 km to 32 km.

The 50K Challenge is an 8-race series consisting of events of length 50 km to 56 km, both trail and road.