Campus police said the 22-year-old woman, who is unaffiliated with the university, was with two friends at the basketball court at the park, which is several blocks south of the main campus, when she got into an argument with another group of people.
Police said one of the men in the other group approached the woman and pushed her about 10 times, forcing her out of the park and onto Dwight Way.
The man then gave a command to his pit bull and the dog attacked the woman, biting her arm, according to university police. The woman was able to escape from the dog and was treated for bite injuries at Alta Bates Medical Center in Berkeley, police said.
Officers searched the area but weren't able to find the suspect, according to authorities.
UC police describe the suspect as a white man who is about 6 feet tall, weighs about 180 pounds, is in his early 30's and has shoulder-length blonde dreadlocks.
The suspect had a triangle tattooed on his chin, another triangle under his left eye and three dots tattooed down his nose, police said.
The suspect's dog is described by police as a tan-colored pit bull.