BOULDER — A 13-year-old girl died Saturday after the pickup truck she was riding in with her father and sister plunged into Boulder Creek, authorities said.

Emergency crews recovered the girl unconscious and unresponsive from the creek behind Boulder High School, several miles downstream from where the truck became submerged, west of the mouth of Boulder Canyon, authorities said.

Rescue workers attempted cardiopulmonary resuscitation before she was rushed to a hospital. Boulder Fire and Rescue diver Brad Lupher said the girl was unconscious and not breathing when pulled from the water.

Dive teams had been deployed up and down the creek for more than an hour to rescue the girl in the water.

More than 50 emergency workers responded.

Lt. Bruce Penfold, of Boulder Fire and Rescue, said, “Because of the way the creek was flowing, it soon became a multi-jurisdiction coordination effort.”

Responding departments included Fourmile Fire, Boulder Fire and Rescue, Boulder Emergency Squad and the Boulder Police Department, among others.

The girl’s identity has not been released.

The incident started about 4:45 p.m. at Sugarloaf Road and Colorado 119. A car traveling east stopped suddenly for a bear in the road, said Commander Steve Cullen of the Boulder County Sheriff’s Office.

A truck with the father and two daughters swerved to avoid it then hit the rear of the car and crashed into the creek, he said.

The father and one daughter were able to get out and were rescued from the far side of the creek by a Boulder Fire Department ladder truck and bucket, he said.

The girl was taken to Boulder Community Hospital, where she was pronounced dead, he said.

Police could be seen east of where the vehicle went into the creek, watching the water, apparently looking for a person in the water.

Penfold said, “Because of the volume of the water and the speed, it was very difficult for us to follow her and get set up in a position to pull her out.”

He added, “We were in contact virtually the whole way. We had eyes on her.”

Lupher said, “She traveled a long way.”

Calculated by roadway alone, the girl traveled more than 4 miles.

The Denver Post contributed information to this report.