RedactedNarrative: On 05/31/2021 at approximately 14:26 hours I received a call from dispatch advising that there was a female on a kayak that had been paddling near a cliff.   While paddling near the cliff a rock fell and struck her in the head.  I was already on patrol on that waterway and rushed to the area of the injured kayaker.  Deputy 2 and I assisted the injured female into our boat along with her family and rushed her to the boat ramp where Magic Valley Paramedics and Twin Falls Fire Department were waiting for us.  The female was transferred from our boat to the life assist chair where she was taken to the ambulance and transported to St. Luke Hospital.  The injury to the victims head was substantial and due to the victim being on blood thinner, was bleeding more profusely than normal.  Numerous attempts have been made to get DOB for the passenger but they have not been successful.