California State Route 29

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State Route 29

Defined by S&HC § 329, maintained by Caltrans

Length:

106 mi^[1] (171 km)

South end:

I-80 in Vallejo

Major
junctions:

SR 12 near Napa

SR 128 in Calistoga

SR 53 near Clearlake

SR 175 near Lakeport

North end:

SR 20 at Upper Lake

State highways in California (list - pre-1964)
County routes in California (list)
< SR 28		SR 32 >
History - Unconstructed - Deleted - Freeway - Scenic

State Route 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.

This route is part of the California Freeway and Expressway System^[2] and is eligible for the State Scenic Highway System^[3].

1 Route description
2 Points of interest
3 Major intersections and exit list
4 References
5 External links

[edit] Route description

Route 29 in Vallejo

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 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.

At the city of Napa the road briefly becomes a freeway again and returns to a four-lane highway (at some parts five) the remainder of the route, terminating 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.

[edit] Points of interest

Lower Lake Stone Jail (California Historical Landmark (CHL) #429) is just south of the intersection of State Route 53 in Lower Lake.
CHL #450, the Stone House, is at the corner of Hidden Valley Rd., north of Middletown.
The marker for CHL #467, St. Helena Toll Road and Bull Trail, can be found at the intersection of Hill Ave in Middletown (postmile LAK 5.5).
Robert Louis Stevenson State Park CHL #710 located near the county line between Lake and Napa Counties at the summit of Mount Saint Helena.
Bale Grist Mill State Historic Park CHL #359 between Calistoga and St. Helena.
Bothe-Napa Valley State Park between Calistoga and St. Helena

[edit] Major intersections and exit list

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 ^[4]^[5]^[6]	#^[7]	Destinations	Notes
Solano SOL 0.00-5.96	Vallejo	0.00		I-80 west / Maritime Academy Drive – California Maritime Academy	Interchange
				To I-80 east / Magazine Street
		1.01		To I-680 / I-780 / Lemon Street
				Curtola Parkway
		2.07		Maine Street	Former SR 141
		4.73		SR 37 to I-80 – San Rafael, Sacramento, San Francisco	Interchange
Napa NAP 0.00-48.58		0.69		American Canyon Road
		4.71		SR 12 east (Jameson Canyon Road) – Fairfield	South end of SR 12 overlap
		R6.20		SR 221 – 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
		24.60		SR 128 east – Lake Berryessa, Winters	South end of SR 128 overlap
	Calistoga	36.89		SR 128 west – Geyserville	North end of SR 128 overlap
Lake LAK 0.00-52.54	Middletown	5.81		SR 175
	Lower Lake	20.31		SR 53
		27.89		SR 281 (Soda Bay Road)
		31.05		SR 175 east	South end of SR 175 overlap
		R40.14		SR 175 west / Main Street (SR 29 Bus. north)	North end of SR 175 overlap
	South end of freeway
	Lakeport	R41.42	102	Lakeport Boulevard, Todd Road – Lakeport
	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