HOLDEN, Maine — A chain reaction crash early Sunday afternoon involving four vehicles sent an Oregon woman to the hospital and shut busy Route 1A down for nearly an hour, a Holden police official said.

The crash happened about 1 p.m., when Katelyn Getchell, 19, of Roque Bluffs, who was driving a Jeep, rear ended a Ford Focus driven by Jennifer Drew, 28, of Oregon, Holden police Sgt. Eduardo Benjamin said.

Drew’s car, which was stopped behind two other vehicles in front of Maine Military Supply, then struck the back end of a Toyota Tacoma driven by Ian Robertson, 28, of Yarmouth, which in turn hit the rear of a Subaru driven by Leah Oliver, 32, of Sidney, Benjamin said.

Drew was taken to St. Joseph Hospital in Bangor for treatment of pain resulting from the crash, he said.

Uninjured were Getchell and her passengers, 18-year-old Morgan Taylor, whose hometown was not available, and a 2-year-old child; Drew’s passenger, Justin Miller, 28, also from Oregon; Robertson and his passenger, Katherine Poor, 23, of Portland; and Oliver and her three children, Benjamin said.

The Focus and the Tacoma were heavily damaged and had to be towed from the crash site, he said.

The pileup shut down Route 1A for about 45 minutes and caused major traffic backups.

According to Benjamin, Getchell indicated that she did not see that the vehicles ahead of her were stopped until it was too late to avoid the crash. He recommended that motorists traveling Route 1A leave a safe distance between their vehicles and those ahead of them, especially during the busy tourist season.