California State Route 116

State Route 116
Route information
Defined by Streets and Highways Code § 416
Maintained by Caltrans
Length:	46.500 mi[1] (74.834 km) SR 116 is broken into pieces, and the length does not reflect the US 101 overlap that would be required to make the route continuous.
Major junctions
West end:	SR 1 near Jenner
	SR 12 in Sebastopol US 101 in Petaluma
East end:	SR 121 near Sonoma
Highway system
State highways in California List Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 115 SR 118 →

State Route 116 (SR 116) is a state highway in the U.S. state of California in Sonoma County. The route runs from State Route 1 on the Pacific coast near Jenner to State Route 121 south of Sonoma.

Route description

This route is part of the California Freeway and Expressway System^[2] and is eligible for the State Scenic Highway System.^[3] However, it is only a scenic highway as designated by Caltrans from SR 1 to the Sebastopol city limit.^[4]

State Route 116 proceeds east along the north bank of the Russian River, from State Route 1 to Guerneville, passing through Duncans Mills, Monte Rio, and Guernewood Park.

At the intersection of the Guerneville Bridge, the route turns southeast and passes through Forestville. The road itself continues eastward, but beyond the bridge the road is called River Road until it reaches Hwy 101. The section connecting Guerneville and Forestville is known as Pocket Canyon Rd., named for the canyon it passes through. For the 4 blocks it passes through Forestville it is called Front Street. Front St. is an east-west street, but it veers south again towards Graton and Sebastopol. Here is is called Gravenstein Hwy North until Covert St. in Sebastopol. There it undergoes another name change: Healdsburg Avenue. But it doesn't last long. Heading south (right turn), it becomes North Main Street for two blocks where it intersects Bodega Highway State Route 12), whereupon it becomes South Main Street. When the one-way street becomes a two-way street again, it becomes Gravenstein Hwy South all the way to Cotati where it becomes Hwy 101 South U.S. Route 101 until it runs along Lakeville Highway to Stage Gulch Rd, where it makes a left turn east toward Sonoma, crossing the Sonoma Mountains directly north of Tolay Lake and descending into the Sonoma Valley to its terminus at State Route 121.

Southbound State Route 116 in downtown Sebastopol.

Major intersections

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions).^[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in Sonoma County.

Location	Postmile [1][5][6]	Exit [7]	Destinations	Notes
	0.00		SR 1 – Bodega Bay, Jenner, Fort Bragg	West end of SR 116
	21.80		Guerneville Road – Santa Rosa
Sebastopol	R26.73– R26.82		SR 12 east (Sebastopol Avenue, Bodega Avenue) – Santa Rosa
Cotati	35.03 12.69[N 1]		US 101 north (Redwood Highway) / Gravenstein Highway – Eureka	Interchange; west end of US 101 overlap
		West end of freeway on US 101
	12.00[N 1]	481A	West Sierra Avenue – Cotati
	10.67[N 1]	479	Railroad Avenue
Petaluma	5.76 [N 1]	476	Old Redwood Highway, Petaluma Boulevard North (US 101 Bus. south) – Penngrove
	4.76[N 1]	474	East Washington Street – Central Petaluma
		East end of freeway on US 101
	3.58[N 1] 35.04		US 101 south (Redwood Highway) / Lakeville Street – San Francisco	Interchange; east end of US 101 overlap
	39.27		Lakeville Road – Lakeville, Vallejo
	44.84		Arnold Drive – Sonoma
	46.75		SR 121 / Bonneau Road – San Francisco, Napa	East end of SR 116
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

References