One man was airlifted to the hospital with serious injuries after a two-vehicle crash that blocked SH-21 on Saturday afternoon.Idaho State Police says that at 12:19 p.m. near milepost 31, a motorcyclist driving an orange 2025 KT M 390 was traveling southbound on SH-21 when the rider collided with the back of a blue Ford Bronco, also traveling southbound.The motorcyclist was identified as a 27-year-old male from Idaho City, who police say is a Boise City Search and Rescue unit. The driver of the Bronco was a 46-year-old male from Medford, Oregon.The Idaho City man was airlifted to the hospital with serious injuries. He was wearing a helmet, ISP said. The driver of the Bronco was wearing a seatbelt and was not transported, police said.SH-21 was blocked for 24 minutes while crews responded to the crash.ISP was assisted by Idaho City Police Department, Boise County Search and Rescue and Air St Lukes. ...read more read less