The Fremont County Sheriff's Office is asking for the public to be on the lookout for Lisa Buchanan, 37.
Buchanan was last seen with her boyfriend, Richard Warren, on April 28.
Warren has multiple warrants for his arrest.
Lisa Buchanan stands 5'4" tall and weighs 154 pounds. She has brown hair and brown eyes.
If you see Buchanan or Warren, you are asked to call 719-784-3411 and press 1. You can also call Fremont County CrimeStoppers at 719-275-STOP (7867).