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Showing posts from June, 2019

Old Highway; Mariposa County (Old Legislative Route Number 18)

A couple years ago I was asked to look into whether a road in Mariposa County called "Old Highway" was once part of California State Route 140.  In my research I found that Old Highway was not ever part of  CA 140 but it was a former segment of Legislative Route Number 18.  This past weekend I returned to Mariposa County to drive the entirety of Old Highway.


Old Highway is a 15 segment of roadway in the Sierra Foothills which spans from Catheys Valley at CA 140 eastward to CA 49 in Mormon Bar.  The general course of Old Highway runs southward to the modern alignment of CA 140.

The origins of LRN 18 date back to the 1909 First State Highway Bond Act.   In 1909 a new State Highway from Merced to Mariposa was declared by the State Legislature during the First State Highway Bond.  The route from Merced to Mariposa eventually became Legislative Route Number 18.  State Highway travel to Yosemite via the Merced River Canyon began when a new route from Mariposa east to El Portal…