Officers responded to the gas station on the 3600 block of Saviers Road around 10:28 a.m. following reports of a robbery.
An employee said the armed suspect pulled out a handgun and demanded money. The clerk complied and the suspect fled with an undisclosed amount of cash.
No one was injured during the incident.
The suspect was last seen fleeing northbound from the area on a bicycle.
He was described as a Hispanic man with a thin build and standing around 5 feet 9 inches. He was last seen wearing a black hat, black hooded sweatshirt, blue jeans and a red bandana.
Anyone with information regarding the robbery was urged to contact the Violent Crimes Hotline at (805) 982-7070.