Eastbound U.S. 34 was closed between Namaqua Road and County Road 23H while officers investigate the scene.
A motorcyclist died in a three-vehicle crash in west Loveland on Thursday evening.
The man was identified as 60-year-old Jahn Clark of Loveland, according to Colorado State Patrol.
CSP trooper Gary Cutler confirmed three vehicles were involved in the crash, which was reported around 6 p.m. Thursday: a semi-truck, a Honda Accord and a Harley Davidson motorcycle.
The driver of the semi-truck, 24-year-old Jared Rodriguez of Greeley, was traveling westbound on U.S. Highway 34 behind a Honda Accord, Cutler said. Clark was traveling eastbound on U.S. 34.
When the Honda slowed to make a left turn on Butte Road, Rodriguez failed to stop and rear ended the Honda, pushing it into Clark, who was ejected from the motorcycle and died on scene, Cutler said.
Speed and alcohol are not being considered as factors in the crash, but Rodriguez was cited, Cutler said.
Rodriguez was not injured. The driver of the Honda suffered minor injuries but was not transported to the hospital.
Eastbound U.S. 34 was closed between Namaqua Road and County Road 23H while officers investigated.
This is the 20th fatal crash on Larimer County roads so far this year. At this time in 2017, 15 people had died on Larimer County roads.
The summer months are traditionally some of the deadliest in Colorado. Last year in Larimer County, 40 percent of crashes involving fatalities occurred in the summer months.