Ygnacio Valley Road

Ygnacio Valley Road- Kirker Pass Road- Railroad Avenue

Iron Horse Regional Trail pedestrian bridge over Ygnacio Valley Road
Ygnacio Valley Road highlighted in red
Maintained by	Walnut Creek, Concord, Pittsburg, and Contra Costa County, California
Length	15.66 mi (25.20 km)
Southwest end	Parkside Drive in Walnut Creek
Major junctions	I-680  / SR 24 in Walnut Creek SR 4 in Pittsburg
Northeast end	E 3rd St in Pittsburg

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.

Route

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

The entire route is in Contra Costa County.

Location	mi	km	Destinations	Notes
Pittsburg	0	0.0	E 3rd Street
	1.15	1.85	SR 4  – Concord, Antioch	Interchange; SR 4 exit 23
	2.55	4.10	Buchanan Road
Concord	7.80	12.55	Clayton Road
	9.89	15.92	Cowell Road
Walnut Creek	11.89	19.14	Oak Grove Road
	13.06	21.02	Walnut Avenue / Bancroft Road
	14.53	23.38	Walnut Boulevard
	14.77	23.77	Civic Drive
	15.08	24.27	North Main Street to I-680 north – Sacramento	No Interchange
	15.45	24.86	I-680  – Concord, Sacramento, San Jose	Northbound exit 46B; no northbound entrance
	15.66	25.20	Parkside Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

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.