They are now 42-0-0 this season when leading after the second period. Goalie Scott Wedgewood put up 25 saves in his first career playoff win, while his teammates outshot the Kings 30-25.
Things were a little slow in the first as the Avs had a chance with the only power play of the period, but failed to put anything up on the board.
Los Angeles' Drew Doughty came close to being the first to score in the series, but missed just wide of the net.
The Kings were held to just five shots in the period.
The second period picked up a bit more as both teams went 0-for-2 on the power play, including a 4-on-4 situation as well.
Colorado's Logan O'Connor thought he had the game's first goal, but it was eventually called back for goalie interference. If it stood, the goal would've marked O'Connor's first-ever playoff goal.
It would take until 4:29 left in the second period for the Avs to finally get on the board.
Artturi Lehkonen scored his first goal of the playoffs after a puck rebounded off Kings goaltender Anton Forsberg from a Nathan MacKinnon shot to make it 1-0.
Almost six minutes into the third period, O'Connor would take advantage of his second opportunity to score his first off the playoffs, fourth of his playoff career, to make it 2-0.
O'Connor missed 69 games this season following hip surgery and didn't have a single goal in the 13 regular season games he did play in after coming back.
It was his first goal in almost a full calendar year, with his last coming on April 26, 2025, against the Dallas Stars in last year's playoffs.
The Kings had an opportune moment before the final 10 minutes of the period began as they went on their third power play.
They came close a few times in front of the net, but no cigar - another wasted opportunity.
Both teams had another 4-on-4 opportunity after Gabriel Landeskog and Adrian Kempe were both given two-minute minors for roughing. And, once again, neither team could find the net with the extra ice space.
Los Angeles would be given another golden opportunity. Colorado's Brock Nelson would get called for a two-minute minor for high-sticking as the Kings would enter their fourth power play of the game.
They wouldn't be denied a fourth time after Artemi Panarin got one by Edgewood thanks to a perfect screen from veteran Anze Kopitar to make it 2-1.
Almost right after Los Angeles cut the lead in half, the Avs would go on their own fourth power play of the game. They almost pulled it off with a perfect two-on-one opportunity in front of the net, but Martin Necas rang it off the crossbar.
They'd still cruise to a win as Game 2 between the Avalanche and Kings is scheduled for Tuesday, April 21st, at 10:00 p.m. Eastern time.
Los Angeles' Mikey Anderson and Alex Laferriere finished Game 1 with the highest Flashscore player ratings, as they were the only two to put up at least an 8.0.