More than 500 mourners said goodbye Friday to the last of three young Toronto men killed in a car crash in Muskoka last week.

Family and friends attended Grace Anglican Church On-The-Hill, in Forest Hill, for the funeral of 20-year-old Tyler Mulcahy.

Mulcahy was remembered as a great friend who was deeply loved by his family.

"It's horrible to lose a friend this young," said one man. "He was a very good man, and you can tell by the amount of people grieving here today"

"(I'm still) devastated," said another mourner. "This 20-year-old was such a beautiful boy."

The other crash victims, 20-year-old Cory Mintz and 19-year-old Kourosh Totonchian, were laid to rest earlier this week.

All three were killed when the vehicle they were riding in burst through a guardrail, struck a tree and plunged into the Joseph River near Port Carling. Mulcahy was the driver.

Autopsies confirmed that the men drowned.

Mulcahy's girlfriend, 19-year-old Nastasia Elzinga, survived the crash with only minor injuries.

She told the Toronto Star she remembered hearing a loud crash before she blacked out. She regained consciousness under water and was able to climb out the window.

Elzinga said Mulcahy was an intelligent person who was also her mentor.

Ontario Provincial Police said Friday alcohol and speed were "definite factors" in the crash.

The group of friends had been visiting Mintz's mother's cottage and had been at a restaurant in the area shortly before the fatal incident.

With a report from CTV Toronto's Jim Junkin