California State Route 29

"CA 29" redirects here. For the congressional district, see California's 29th congressional district.

State Route 29
Route information
Defined by S&HC § 329
Maintained by Caltrans
Length:	105.648 mi (170.024 km)
Existed:	1934 – present
Major junctions
South end:	I-80 in Vallejo
	SR 12 near Napa SR 128 in Calistoga SR 53 near Clearlake SR 175 near Lakeport
North end:	SR 20 at Upper Lake
Highway system
State highways in California(list • pre-1964) History • Unconstructed • Deleted • Freeway • Scenic ← SR 28 SR 32 →

State Route 29 (SR 29) is a state highway in the U.S. state of California that travels in a north–south direction from State Route 20 in Upper Lake to Interstate 80 in Vallejo.

Route description

Route 29 in Vallejo

This route is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System. However, it is not a scenic highway as defined by Caltrans.

SR 29 starts as a two-lane highway until Lakeport and becomes a freeway as it bypasses the city. South of the city, it reverts back to a two-lane highway, going around Clear Lake, the largest natural freshwater lake completely within California, passing through Kelseyville, Lower Lake, and Middletown. It then climbs Mount Saint Helena, an extinct volcano, at the border between Lake County and Napa County. Through Napa Valley, the highway passes through Calistoga, St. Helena, Rutherford, Oakville, Yountville and Napa while passing many of the region's notable vineyards and wineries. This portion of the highway is often heavily congested with rental cars and tour buses in spring and summer, when tourists flock to Napa Valley from San Francisco.

The route briefly becomes a freeway again as it passes through the city of Napa, then returns to a four-lane expressway (on some segments, five) for the rest of its length. It terminates at I-80 near the Al Zampa Bridge in Vallejo.

Historically, the route between Middletown and the Napa Valley was served by the Old Bull Trail Road, built by volunteers in the 1850s that had grades up to 35 percent. That was replaced by the St. Helena Toll Road in 1868, which had more manageable inclines of up to 12 percent. The State of California purchased the toll road in 1925.

The points of interest along Route 29 include the Lower Lake Stone Jail, the Stone House, The St. Helena Toll Road and Bull Trail, The Robert Louis Stevenson State Park, The Bale Grist Mill State Historic Park and the Bothe-Napa Valley State Park.

California State Route 29 may be most famous for its path through the heart of Napa Valley, considered by many to be America's most prestigious wine region. Many famed wineries, including Robert Mondavi, Beringer and Sutter Home are located along Route 29.^{[citation needed]}

Major intersections

Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.'

County	Location	Postmile	Exit	Destinations	Notes
Solano SOL 0.00-5.96	Vallejo	0.00		I-80 west / Maritime Academy Drive – California Maritime Academy	Interchange
				Magazine Street to I-80
		1.01		Lemon Street to I-680 / I-780
				Curtola Parkway to I-780 – Benicia
		2.07		Maine Street	Former SR 141
		2.82		Tennessee Street
				Redwood Street
		4.73		SR 37 to I-80 – San Rafael, Sacramento, San Francisco	Interchange
Napa NAP 0.00-48.58	American Canyon	0.69		American Canyon Road
		R2.77		Watson Lane, Green Island Road	Interchange
		4.71		SR 12 east (Jameson Canyon Road) / Airport Boulevard – Fairfield, Sacramento, Napa County Airport	South end of SR 12 overlap
		R6.20		SR 221 / Soscol Ferry Road – Downtown Napa, Lake Berryessa
		R8.66		SR 121 south / SR 12 west (Carneros Highway) – Sonoma	North end of SR 12 overlap; south end of SR 121 overlap
	South end of freeway
	Napa	10.31	16	SR 121 north (Imola Avenue) – Lake Berryessa	North end of SR 121 overlap
		11.55	18A	First Street – Downtown Napa
		12.04	18B	Lincoln Avenue
		13.06	19	Trancas Street, Redwood Road	Former SR 221
		North end of freeway
				Sierra Avenue	Interchange; northbound exit and entrance
	Yountville	19.03		California Drive – Yountville, Veterans Home	Interchange
	Rutherford	24.60		SR 128 east (Rutherford Road) – Lake Berryessa, Winters	South end of SR 128 overlap
	Calistoga	36.89		SR 128 west (Foothill Boulevard) – Geyserville	North end of SR 128 overlap
		39.50		Tubbs Lane – Santa Rosa, Geyserville
Lake LAK 0.00-52.54	Middletown	5.81		SR 175 (Main Street)
	Lower Lake	20.31		SR 53 north / Morgan Valley Road (Main Street) – Clearlake
		27.89		SR 281 (Soda Bay Road) / Red Hills Road – Soda Bay
		31.05		SR 175 east – Middletown	South end of SR 175 overlap
		R40.14		SR 175 west / South Main Street (SR 29 Bus. north), Soda Bay Road – Hopland	North end of SR 175 overlap
	South end of freeway
	Lakeport	R41.42	102	Lakeport Boulevard, Todd Road – Lakeport
		R42.68	103	11th Street, Scotts Valley Road – Lakeport
		R45.15	106	Hill Road, Park Way
		R47.85	108	Nice-Lucerne Cutoff (SR 29 Bus. south)
	North end of freeway
		52.54		SR 20 to US 101 – North Shore Resorts, Williams
1.000 mi = 1.609 km; 1.000 km = 0.621 mi      Concurrency terminus •      Closed/former •      Incomplete access •      Unopened

External links

• California @ WestCoastRoads - State Route 29
• Caltrans: Route 29 highway conditions
• California Highways: SR 29
• Cal-NExUS: Route 29 North
• Cal-NExUS: Route 29 South