They chanted ''Justice for Tina'' and ''Tina's Life Matters.''
Rallies were held in a number of cities after the acquittal Thursday of a man accused of murdering Indigenous teenager Tina Fontaine.
People gathered in Montreal, Regina, Vancouver and Victoria and elsewhere.
"You know, there other Tinas, there are other Coltens out there. And it's to wake up Canadians, wake up the people of this country [that we are mobilizing], said Ellen Gabriel of Kahnesetake at a vigil held Saturday at Montreal's Cabot Square.
Signs at many of the rallies also called for ''Justice for Colten,'' linking the acquittal with a similar verdict in the fatal shooting of 22-year-old Indigenous man Colten Boushie in Saskatchewan.
One sign in Vancouver read: ''Canada is a serial killer of Indigenous people.''
Tina Fontaine was just 15 when she died and was in government care when she disappeared.
The Indigenous teen had become caught up in a web of sexual exploitation before her disappearance and death.
There was no DNA evidence linking suspect Raymond Cormier to Tina and experts could not determine how she died.
Fontaine's remains were discovered eight days after she was reported missing in August 2014; Raymond Cormier was charged more than a year later.
The Crown had argued in its final submission that Cormier, 56, convicted himself with his own admissions on secret police recordings.
But the defence said numerous forensic holes in the prosecution's case had left reasonable doubt.
Earlier this month, Gerald Stanley's lawyer successfully argued that during a confrontation on his property in 2016, Stanley's handgun went off accidentally, killing 22-year-old Colten Boushie with a single shot to the back of the head.
According to testimony, Boushie and some friends were on Stanley's property looking for help with a flat tire. Under cross-examination some admitted they lied to investigators about trying to break in to a truck on a nearby property earlier in the day, and changed their stories right before taking the witness stand.
Stanley testified that he fired warning shots to scare the group off. He said that the fatal shot occurred when he reached into the SUV to grab the keys and his gun “just went off.”
Boushie`s mother was skeptical to say the least.
"That ain't no freak accident, Gerald Stanley is a freak accident," she said during a protest on February 10. "Shouldn't have been born—yes, he's a murder!"
—with files from Andrew Brennan and CTV Montreal