Sulphur Springs Trail Race is a 9 event set of races occuring at the end of May.
Part of the Ontario Ultra Series, the race starts (and finishes) at the Ancaster Community Centre and heads off to the trails of the Dundas Valley Conservation Area.
The ultra race categories are 200 miles, 100 miles, 100-mile relay, 100K, 50 miles and 50km and they all have their own ultimate cut-off time.
Mandatory pre-race briefing for all 100 milers. The route is marshalled for five hours only but is fully waymarked. Pacers and crews are allowed. Drop bag facilities available.
All distances run on a 20km loop consisting of, approximately, 97% trails and 3% roads within the conservation area.
There will be 5 checkpoints along the loop, at distances of 3 and 6 km, where food and drinks will be available.