Lost Blue Merle Border Collie named Nessie from Conifer Mountain

HELP! I came home from work and my Blue Merle Border Collie is missing. She is not wearing her collar. Her name is Nessie, she is on heart medication and I need to find her. I live on Conifer Mountain, and I do not know how long she has been gone. I can be reached at 303-838-0878 or on my cell at 720-331-0998
Please help me find her.

Thank you everyone she is Home. Walked in the back door about 20 minutes ago.