Portal:California/Did you know/9 - Wikipedia

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Headwaters area of Yulupa Creek

...that the easternmost part of California State Route 20 follows a branch of the historic California Trail, parts of which have been preserved as a National Recreation Trail?
...that Alameda Street was built by Los Angeles County, California as a "truck boulevard" to the port?
...that the Yulupa Creek watershed has been designated as critical habitat for two California endangered species?