SR-142: Carbon Canyon Road

ca_142_smallCarbon Canyon Road
Runs from SR-90 in Brea to SR-71 in Chino

This roadway is mostly two lanes and runs through a somewhat rural section of the Chino Hills. It passes by a large state park – Chino Hills State Park, as well as a few small housing developments and open spaces. Near the Orange / San Bernardino County line, the road reaches a low summit with a couple of very sharp curves. Commuters, as well as locals, use this roadway, making it quite congested during peak times. Beyond minor upgrades along the way, there are no plans to widen this roadway beyond its current two-lane configuration.

Carbon Canyon Road in San Bernardino County:

Old alignment of 142 at Chino Hills Pkwy and Carbon Canyon Rd.
Old alignment of 142 at Chino Hills Pkwy and Carbon Canyon Rd.
Near the summit on Carbon Canyon, lots of sharp curves ahead (really tight switchback actually).
Near the summit on Carbon Canyon, lots of sharp curves ahead (really tight switchback actually).
Switchback near the summit. Most curves don't get such a wacky sign.
Switchback near the summit. Most curves don’t get such a wacky sign.

Orange County:

Sign at the Carbon Canyon Road / Valencia Road junction.
Sign at the Carbon Canyon Road / Valencia Road junction.
END sign at the western end.
END sign at the western end.
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