California / Dowest Slough /

Antioch Marina Boat Launch Ramp

Antioch Marina Boat Launch Ramp is a public boat ramp on Dowest Slough near Antioch, California.

Aerial view of the ramp lanes, long boarding docks and the parking lot on the slough, May 2022
Aerial view of the ramp lanes, long boarding docks and the parking lot on the slough, May 2022 Photo: USDA Farm Service Agency, NAIP · Public domain · via USGS The National Map

Status not reported No closure has been posted for this launch, but its agency does not publish open or closed status. Check with the managing agency before you tow.

At the launch

Type
Boat ramp
Tidal
Yes
Website
antiochca.gov
Coordinates
38.01888, -121.81791

Directions (Google) Apple Maps

Channel depths in feet from the Army Corps' surveys (Sacramento District; the one nearest this launch is of January 2, 2026). Not for navigation.

Conditions

Marine advisories

Advisories in effect load here; without them, see the NWS zone forecast below.

National Weather Service marine zone PZZ530, San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. Zone forecast: winds, seas, warnings.

Tides

Predicted highs and lows at NOAA's Antioch station, 0.2 mi from this launch, in local time above MLLW. Predictions, not observations: wind and weather move the real tide. Full predictions at NOAA.

Tide predictions, Mon Nov 2 to Sun Nov 8
Mon Nov 2 Low 3:32 am -0.2 ft · High 10:00 am 3.1 ft · Low 3:27 pm 1.2 ft · High 8:59 pm 3.2 ft
Tue Nov 3 Low 4:25 am -0.2 ft · High 10:49 am 3.4 ft · Low 4:41 pm 0.9 ft · High 10:19 pm 3.1 ft
Wed Nov 4 Low 5:13 am 0.0 ft · High 11:34 am 3.6 ft · Low 5:48 pm 0.6 ft · High 11:25 pm 3.0 ft
Thu Nov 5 Low 5:56 am 0.1 ft · High 12:15 pm 3.8 ft · Low 6:47 pm 0.3 ft
Fri Nov 6 High 12:25 am 2.9 ft · Low 6:36 am 0.4 ft · High 12:51 pm 3.9 ft · Low 7:42 pm 0.0 ft
Sat Nov 7 High 1:21 am 2.7 ft · Low 7:14 am 0.7 ft · High 1:22 pm 3.9 ft · Low 8:33 pm -0.2 ft
Sun Nov 8 High 2:16 am 2.6 ft · Low 7:48 am 0.9 ft · High 1:46 pm 3.8 ft · Low 9:21 pm -0.4 ft

Channel survey

The Army Corps surveys the channels it maintains and posts every survey.

  • Stockton Channel · 0.1 mi from this launch
    Condition survey of January 2, 2026 by the Sacramento District. Least depth in the channel (R5 - STA. 219+60 to 274+50): 40.3 ft below mean lower low water (MLLW); project depth 35 ft. Survey sheet (PDF)

US Army Corps of Engineers hydrographic surveys, from eHydro. A survey shows the bottom on the day it was made; channels shoal after high water and change with dredging. Not for navigation.

On Dowest Slough

Bay in California. All launches on Dowest Slough.

Community

Where people who use Dowest Slough talk about it.

Nearby launches

Sources

Why it is listed as public: www.antiochca.gov: The Antioch Marina Boat Launch Ramp is located adjacent to the marina with a separate parking lot.. Something wrong, or is this launch private? Send a correction; it goes to a person.