The win snapped a seven-game losing streak by Colorado, their second-longest of the season.
Five different Washington skaters scored in a 5-3 game that moves the Capitals one step closer to a President's Trophy.
The Avalanche came out with intensity in the first period. They just hit a proverbial iceberg in the second and could never recover.
Francois Beauchemin lit the lamp with 1:14 remaining in the third period on Thursday to break a 2-2 tie and give Colorado its 10th home win on the season.
It was a night of firsts for a pair of Avs on Saturday as Colorado skated to a 5-3 victory over the Buffalo Sabres at Pepsi Center.
At the All-Star break the Colorado Avalanche are dead last in the NHL. Here's a look at whether or not this Avalanche team is having the worst season ever in Denver professional sports.
The Colorado Avalanche now have three different losing streaks of five games or more on the 2016-17 season after falling in Calgary on Wednesday.