Napa-Sonoma Marshes Wildlife Area Directions to Units
It is highly recommended that you print out a map of the wildlife area prior to accessing.
Huichica Creek (1,091 acres)
From Hwy 12/121 turn south on Duhig Road and proceed approximately 2 miles then turn left on Las Amigas Road. Follow Las Amigas Road east until it connects with Buchli Station Road then turn right (south) on Buchli Station Road and follow the road through the vineyard areas until you cross the rail road tracks adjacent to CDFW parking lot.
All visitors are encouraged to walk existing trails, levees and service roads south of the railroad tracks.
Napa River (8,200 acres)
The southern ponds (Ponds 1 and 1A) can be viewed from State Hwy. 37 which is located just north of San Pablo Bay. Where the Mare Island Bridge crosses the Napa River travel west 3.5 miles to a parking lot and locked gate on the north side of the highway with an opening provided for pedestrian access. The pedestrian access point in the gate allows foot traffic north to the large metal power transmission towers that bisect the pond. Within Ponds 1 and 1A, beyond the power towers to the north is a zone closed to hunting and fishing. The remaining portion of the Napa River Unit is to the north of these ponds, between South Slogh and Napa Slough (refer to area map), and is accessible only by boat.
Ringstrom Bay (396 acres)
The unit can be viewed from Ramal Road. From State Hwy. 12/121 take Ramal Road south. Travel approximately 5 miles where you will see a large hay barn to your right, turn here. The first lot you enter is the parking lot, owned by the Sonoma County Water Agency which maintains the Hudeman Slough mitigation and enhancement wetlands. You can access Ringstrom Bay by following the posted signs at the kiosk.
Wingo (783 acres)
From State Hwy. 121 turn south on Millerick Road. Continue along this road, following the contours of Sonoma Creek (turns to dirt) until you reach the parking lot across from the pumphouse. This is the only designated parking for the area.
Tolay Creek – South (150 acres)
This unit is adjacent to the United States Fish and Wildlife Service's property on Tubbs and Lower Tubbs Island (which is part of the San Pablo Bay Wildlife Refuge). The primary access point is located ½ mile east of the intersection of State Hwys. 121 and 37 on State Hwy. 37 (south side of the highway).
Napa-Sonoma Marshes Wildlife Area Directions to Units
Tolay Creek – North (180 acres)
The entrance to this area is on the east side of State Hwy. 121, just north and across the highway from the main entrance to Infineon Speedway. Go through the gate and follow the gravel road to the gravel parking lot. The gravel road marks the northern boundary of the unit, which extends south in a narrow strip to State Hwy. 37.
American Canyon (451 acres)
Due to increasing residential development to the east and south this unit is primarily boat access only.
Napa-Sonoma Marshes Wildlife Area Directions to Units