Approximately 100 cars were stuck near Palomar Mountain Tuesday afternoon due to icy conditions on the roads, CHP officials said.
Traffic along South Grade Road and Canfield Drive was backed up all the way to the observatory at about 1:30 p.m. as officials worked to clear the roads.
Some tow trucks were requested to assist in clearing the road.
One traffic collision was reported on the road at about 2:15 p.m.
Weather in the area was relatively cold on Tuesday, with daytime temperatures in the low 40s and nighttime temperatures dipping to freezing levels overnight.
Photo Credit: Kris Dietmeyer