UPDATE: Kyle Fallon has been located in the Bay Area and is alive and well.
According to the Sacramento County Sheriff's Department 23-year-old Kyle Fallon is considered at-risk and is missing.
Deputies say Fallon left his home on the 9100 block of Rosewood Drive about noon Monday.
According to reports, he left saying he was going for a bike ride along the American River. He did not take his wallet or a cell phone.
Deputies say he has curly brown hair, blue eyes and a goatee.
Deputies ask that anyone with information calls the department.