La Plata County Commissioner Gwen Lachelt and Durango Mayor Christina Rinderle will speak, and Eddie Box, a Southern Ute tribal member, will perform a blessing. Kevin Bell, with the Durango Choral Society, will sing.
Organizers of the vigil in Durango ask that participants bring their own water and candles.
Forty-nine people were killed early Sunday at an Orlando gay club after a lone gunman entered the bar and opened fire, interrupting an evening of drinking, dancing and drag shows at a club known for tolerance for all people.
Authorities say suspect Omar Mateen, carrying an assault-style rifle and a handgun, fired more than 50 rounds. He shot at police and he took hostages. When the gunfire at the Pulse Orlando club finally stopped, 50 people – including Mateen – were dead and dozens critically wounded in the deadliest mass shooting in recent U.S. history.
The Associated Press contributed to this report.