TODAY
FILM
A vast amount of trail cams were laid throughout a mountain range in Montana during a decade to learn about large cats in the wild, and the results, the revealing documentary “Tracking Notes: The Secret World of Mountain Lions,” is screened at 6:30 p.m. Friday, 5:30 p.m. Saturday and 5 p.m. Sunday at the Dairy Arts Center, 2590 Walnut St., Boulder; $12; thedairy.org.
MUSIC
Specializing in classic rock hits from the past five decades — yes, the 1970s were 50 years ago — the band Playback plays from 6 to 9 p.m. Friday at Bootstrap Brewing, 142 Pratt St., Longmont. Visit bootstrapbrewing.com for more info.
Pianist Ron Legault leads his band through a mashup of a couple of holiday classics during Ron Legault’s “Charlie Brown goes to the Nutcracker” jazz show at 6…
