The Grim Reapers Motorcycle Club was an outlaw motorcycle club, founded in 1967 in Calgary, Alberta, that was active during the 1960s and 1970s; it grew to become a dominant club in the region during the 1980s and 1990s.

They were apparently independent of a US-based motorcycle club of the same name that was founded in 1965 in Louisville, Kentucky. Along with the Rebels, the Warlords, and King's Crew,The History of Kings Crew MC from One Percenter Bikers. they were one of the four dominant outlaw motorcycle clubs operating in Alberta prior to 1997. In 1997, the club became part of the Hells Angels in a patch-over ceremony held in Red Deer, Alberta.Fallen Angel: The Unlikely Rise of Walter Stadnick in the Canadian Hells Angels, by Jerry Langton, John Wiley & Sons Canada Ltd, 2006, pp 180-184

In 1970, 11 members and 2 associates were sentenced to life in prison for the murder of Ronald Hartley, president of the Outcasts Motorcycle Club. After an appeal several members were released and others had their sentences reduced. Two members were eventually convicted and sentenced to life in prison for the murder.Supreme Court of Canada: Emkeit v. R., S.C.R. 133 , date: 1972-01-25. (Internet Archive)

The Grim Reapers were listed as an "Outlaw Motorcycle Gang" by Criminal Intelligence Service Canada.Outlaw Motorcycle Gangs, Criminal Intelligence Service Canada (CISC) Report, 2000 In 1997, primarily because of public outcry due to escalating violence in eastern Canada between the Rock Machine and the Hells Angels' Quebec chapters, the Canadian government passed Bill C-95 which amended the Criminal Code (and other legislation) to give Canadian law enforcement organizations powers similar to those provided to their American counterparts via RICO.CBC News In Depth: Biker Gangs in Canada, CBC News On-line, April 5, 2007

Several former members of the Reapers, later to become members of the Hells Angels' Western Canadian chapters, were eventually successful in their challenge of charges brought against them under the new legislation as a result of events that occurred in relation to their patch-over gathering in Red Deer. In 2005, the bikers in Alberta won a major court victory when a judge ruled that police violated their constitutional rights during a roadside check in 1997.Canada's Anti-gang Law, CBC News On-line, April 10, 2006

References

Further reading CBC News In Depth: Biker Gangs in Canada CBC News In Depth: Canada's Anti-gang Law The Fifth Estate: The Road to Hell: The Rise of the Hells Angels in Quebec York University's Nathanson Center for the Study of Organized Crime and Corruption Supreme Court of Canada Emkeit v. R., 1974 S.C.R. 133 Date: 1972-01-25