Reinhart completed the hat trick with a one-timer from between the circles on the power play at 5:59 of the third period to give Florida a 5-4 lead.
Matthew Tkachuk had a goal and three assists, and Aleksander Barkov had four assists for the Panthers (25-12-2), who have outscored their opponents 31-14 during the streak. Carter Verhaeghe scored twice and had an assist, and Sergei Bobrovsky made 22 saves.
Cale Makar and Valeri Nichushkin each had a goal and an assist, and Mikko Rantanen had two assists for the Avalanche (25-12-3), who had won four straight. Ivan Prosvetov allowed four goals on 13 shots before being replaced by Alexandar Georgiev at 8:50 of the second period. Georgiev made 12 saves.
Verhaeghe gave the Panthers a 1-0 lead at 1:10 of the first period when he one-timed Sam Bennett’s pass to the far side from low in the right face-off circle.
Reinhart extended the lead to 2-0 at 3:02 when he redirected Gustav Forsling’s shot from the blue line off Prosvetov.
Reinhart made it 3-0 at 7:41, scoring to the glove side on a breakaway after Barkov fed him up the middle.
Makar cut it to 3-1 at 21 seconds of the second period with a wrist shot from the right circle to the far side.
Josh Manson it to 3-2 31 seconds later with a shot from the blue line. Bobrovsky made the save, but the puck caromed off Verhaeghe and over the goalie before trickling in.
Nichushkin tied it 3-3 at 4:34 by deflecting Makar’s point shot.
Oliver Ekman-Larsson scored from the point to put Florida back in front 4-3 at 8:50, chasing Prosvetov.
Jonathan Drouin tied it 4-4 on a breakaway at 3:31 of the third period after outskating Niko Mikkola to the puck in the offensive zone.
After Reinhart gave the Panthers the lead, Kevin Stenlund pushed it to 6-4 at 8:59 with a backhand from the right circle following a face-off.
Tkachuk scored into an empty net to make it 7-4 at 16:17, and Verhaeghe’s empty-net goal at 16:54 made it an 8-4 final.
