Ygnacio Valley Road is a major arterial road in central Contra Costa County, California. It extends from Interstate 680 and SR 24 in Walnut Creek to SR 4 in Pittsburg. The road passes through Concord and borders Clayton. In the northern half of the route, it is also known as Kirker Pass Road and then Railroad Avenue. It is listed, but not signed, as Hillside Avenue at its southwest terminus.

Ygnacio Valley Road- Kirker Pass Road- Railroad Avenue
Iron Horse Regional Trail pedestrian bridge over Ygnacio Valley Road
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Maintained byWalnut Creek, Concord, Pittsburg, and Contra Costa County, California
Length15.66 mi (25.20 km)
Southwest endParkside Drive in Walnut Creek
Major
junctions
I-680 / SR 24 in Walnut Creek
SR 4 in Pittsburg
Northeast endE 3rd St in Pittsburg
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Route

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The route begins near the Interstate 680/Highway 24 junction, at the westbound entrance to Highway 24 at Ygnacio Valley Road, although this portion is actually signed as Hillside Avenue. It then changes signage to Ygnacio Valley Road through an interchange with I-680 and continues though downtown Walnut Creek and Heather Farm Park.[1]

The road then enters Concord through Lime Ridge Open Space and continues into the Clayton Valley neighborhood. After the intersection with Clayton Road, it becomes Kirker Pass Road and makes an approximately 4.5 mile-long pass over the northern Diablo Range. It then enters Pittsburg, where it becomes Railroad Avenue at the Buchanan Road intersection. From here it continues through central Pittsburg before terminating at E 3rd St near the Pittsburg Marina.[2]

Major Intersections

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The entire route is in Contra Costa County.

LocationmikmDestinationsNotes
Pittsburg00.0E 3rd Street
1.151.85  SR 4 – Concord, AntiochInterchange; SR 4 exit 23
2.554.10Buchanan Road
Concord7.8012.55Clayton Road
9.8915.92Cowell Road
Walnut Creek11.8919.14Oak Grove Road
13.0621.02Walnut Avenue / Bancroft Road
14.5323.38Walnut Boulevard
14.7723.77Civic Drive
15.0824.27 
 
 
North Main Street to I-680 north – Sacramento
No Interchange
15.4524.86  I-680 – Concord, Sacramento, San JoseNorthbound exit 46B; no northbound entrance
15.6625.20Parkside Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

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  1. ^ Walnut Creek, City of (2014-02-28). "THE LANDING AT WALNUT CREEK APARTMENTS PROJECT DRAFT EIR 4.12 TRANSPORTATION AND TRAFFIC". City of Walnut Creek. Retrieved 2021-09-12.
  2. ^ Planning Division, The City of Pittsburg (2009-11-02). "Railroad Avenue Specific Plan". City of Pittsburg. Retrieved 2021-09-13.