RedactedNarrative: On 3/28/2015 at approximately 1820 hrs, V1 was traveling north along a narrow section of the river where beaches are separated by rocky breakwaters on the Colorado River. A yellow jet ski (V2) left the shoreline of Circle Beach and cut in front of V1. V1 made a sharp right turn to avoid collision. Four of the five occupants of V1 were ejected, landing in the water. V1 grounded and came to final rest on a rocky point that separates the beaches on the east shoreline. The speed of V1 was greater than reasonable and prudent given the circumstances and the inability of the operator to control the vessel following the evasive maneuver.