California State Route 189
SR 189 begins at Lake Gregory Drive approximately twenty feet north of State Route 18, between the community of Arrowhead Highlands to the west and the community of Rimforest to the east.It continues roughly eastward through Twin Peaks to the community of Agua Fria (Spanish, cold water), where it forms a tee with the northern terminus of Daley Canyon Road.It turns northeast and continues from there through the downtown section of the community of Blue Jay.It ends at State Route 173 in the Village area of the community of Lake Arrowhead.[6] Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage.