A few miles from Lake Arrowhead, SR 173 becomes paved and enters the community of Cedar Glen, where it parallels the Lake Arrowhead shoreline and encounters SR 189 and turns south to terminate at SR 18.
A few miles from Lake Arrowhead, SR 173 becomes paved and enters the community of Cedar Glen, where it parallels the Lake Arrowhead shoreline and encounters Papoose Lake. The highway enters the community of Lake Arrowhead, where SR 173 intersects SR 189 and turns south to terminate at SR 18.