Twenty firefighters, with the assistance of some rope, pulled an 800-pound white male horse Saturday from out of the mud and water of a marsh, in a remote and heavily vegetated section of the Hansen Dam Recreation Area in Pacoima.

Firefighters and paramedics dispatched at 10:56 a.m. to 11798 W. Foothill Blvd. were also assessing the injuries of a woman, who was the horse's rider, said Brian Humphrey of the Los Angeles Fire Department.

"The horse is now walking. The circumstances that led to the entrapment, as well as the horse's medical status or any injury to the animal have not been determined," Humphrey said.

He said 75 percent of the horse's body was stuck in the mud and water of the marsh.