BOISE -- A motorcycle rider was killed Thursday morning when he slammed into a pickup truck in Boise.

The wreck happened at 8:05 a.m. on Cole Road near the westbound I-84 ramp, across from the Mormon Temple.

Police say the pickup's driver was making a left turn from southbound Cole Road onto Brentwood Drive when the crash happened According to Boise Police Lt. Stan Niccolls, witnesses said the motorcycle rider was headed northbound "at a high rate of speed," and clipped the back of the pickup as it turned.

"It actually made it most of the way through the turn when the motorcycle, who was passing vehicles on the right hit the rear passenger portion of the bed of the truck," Niccolls said.

The man was thrown off of the motorcycle and flew at least 50 feet, landing in the road. He was not wearing a helmet, and died at the scene.

Ada County Coroner Dotti Owens says the crash victim was 23-year-old Aleksandr Tymoschuk of Meridian. The cause of death is listed as blunt force trauma due to a motorcycle accident.

The pickup driver remained on scene and is being interviewed by police. Niccolls said the driver was "shaken up," but unhurt.

"It's very traumatic to see something like that," he said.

Cole Road was completely shut down until noon.

The fatal crash marks the fourth motorcyclist to die in a wreck in the Treasure Valley this week. Only one of the four was wearing his helmet.

Niccolls said the uptick in motorcycle deaths is likely related to the weather, as riders take to the roads again after a long, cold winter. He urged everyone who gets on a motorcycle to obey traffic laws and put their helmets on.

"Wear a helmet. I can't say that enough," he said. "I don't care if it messes up your hair, I don't care if it messes up your look. That doesn't matter when you wreck, and you don't have one on."