| County Route 66 | |||||||
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| National Trails Highway | |||||||
| Route information | |||||||
| Length: | 206.1 mi (331.7 km) | ||||||
| Existed: | 2011 – present | ||||||
| Major junctions | |||||||
| West end: | 1st Street in Oro Grande | ||||||
| East end: |
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| Location | |||||||
| Counties: | San Bernardino | ||||||
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County Route 66 (CR 66) is an east–west numbered road in San Bernardino County, California. It runs for 206.1 miles (331.7 km) from Oro Grande (north of Victorville) to the Arizona state line via Interstate 40 south of Topock, Arizona. The entire route is part of the former US 66. It is the only numbered county route in San Bernardino County.
The route is part of the California Route Marker Program. CR 66 begins at its western terminus, on the National Trails Highway at the intersection of 1st Street in unincorporated Oro Grande, near the Victorville city limits. From there, it heads north towards Barstow where it becomes Main Street headed eastbound. After an overlap with Interstate 15 Business (I-15 Bus.), it continues south to the I-40 interchange, where it runs concurrently with I-40 east for four miles (6.4 km) before splitting from the freeway at the Nebo Street exit. At that junction, CR 66 runs parallel to I-40 all the way to Ludlow, but then turns southeast towards Amboy Crater National Natural Landmark. It then heads back towards I-40, crossing paths with the freeway again at Fenner, before heading east on Goffs Road to the junction with US 95. Next, CR 66 cosigns along US 95 south to the junction with I-40, where both the US and county routes cosign with I-40 heading east towards Needles. CR 66 exits the freeway at River Road Cutoff, where it immediately turns onto National Trails Highway after exiting. The route follows National Trails Highway to its end on River Road, then begins its southeast journey into downtown Needles. After an interchange with I-40, CR 66 begins its overlap with Interstate 40 Business (I-40 Bus.). At the junction with N Street, CR 66/I-40 Bus. turns south via Broadway Street, and meets I-40/US 95 at another interchange near the Riverview Cemetery. At this interchange, I-40 Bus. terminates, and US 95 south begins cosigning with CR 66 again. The two routes diverge at 5 Mile Road, which carries CR 66 back to I-40 north of the Needles Border Station. CR 66 follows I-40 east to the Arizona state line over the Colorado River, where it terminates.