For some reason, I too think two people have died at Blue.It's not an everyday thing, but it definitely happens. There has been two deaths at the now closed DH place here (@mykel can confirm...maybe it was only 1).
1 other person in Toronto fell off a cliff, though its been debated if they were even on their bike.
Then there are the random freak stuff, like heart attack and whatnot while biking.
Cyclist who died in Don Valley identified - Canadian Cycling Magazine
Toronto cycling community mourns the death of 44-year-old Jake Abramowiczcyclingmagazine.ca
Cyclist dies in mountain bike crash on trail at Blue Mountain Resort
A cyclist has died in a crash on a mountain bike trail at the Blue Mountain Resort.beta.ctvnews.ca
Mountain bike rider dead after fall from cliff at Kelso - Canadian Cycling Magazine
On Thursday morning, a 35-year-old mountain bike rider fell to her death at the Kelso Conservation Area near Milton, Ont. According to reports, the womancyclingmagazine.ca
I heard through the grapevine, that there was a death out at the Pines this year, but nothing I can find online.