Lehkonen gave Colorado a 3-1 lead with a power-play goal at 4:14 of the third period when he fired in his own rebound from the slot.
Alex Newhook appeared to draw the Canadiens within one at 10:55 but a video review determined his stick made contact with the puck above the level of the crossbar when he deflected Kirby Dach’s wrist shot from the left point.
“You never know, right?” Blackwood said about waiting out the review. “You never know what they see, what the cameras see. I know what I see, and I’m reaching to go deflect it over the net. So I thought it was a good call, high stick, but we’ve been on the wrong end of a few of those so it’s nice to get one go our way.”
Nicolas Roy shot into an empty net with 13 seconds remaining for the 4-1 final.
“I thought the guys played a (heck) of a game tonight, limiting their dangerous rush and really playing solid defense, taking care of second chances and making my job a little bit easier,” Blackwood said.
Colorado defenseman Brent Burns became the 14th NHL player to reach 1,600 games played paired with Alex Gagne, who made his NHL debut.
“I think it’s cool, that’s why I started them,” Bednar said. “It’s like two opposite ends of the spectrum, right? First game, 1,600th game, both guys playing the game with a ton of enthusiasm and excitement still. That’s what’s so special about ‘Burnsie.’ He comes to the rink every day, loves being around the guys, loves going on the ice, loves playing.
“He’s going to give it his all and it’s a perfect guy for a guy like ‘Gags’ because not too many guys get that amount of games. And then when you do, to still be playing with that sort of excitement on a nightly basis is pretty special.”
NOTES: Burns played his 1,028th consecutive game, second only to Phil Kessel’s NHL record of 1,064. … The Avalanche have won 53 straight games when holding a lead after the first two periods dating to April 3 last season. The only longer such streak in NHL history was a 66-game streak by the Pittsburgh Penguins from April 11, 2015, to Feb. 25, 2017. … It was the first time the Canadiens trailed at the end of the first period in 20 games this season. … Montreal was without Chris Kreider. The 35-year-old forward will miss 6-8 weeks with a lower-body injury he sustained in a 5-2 win at the Boston Bruins on Thursday.