Facility, Road & Trail Closures

Road Closures

Caltrans will be closing sections of Marshlands Road from April 2 - April 12, 2019 in the area between the Headquarters Parking Lots and the Dumbarton Fishing Pier. Please watch for flaggers and drive with caution. 

 Trail News:    

A section of the Alviso Slough Trail will be will be intermittently CLOSED for levee improvements Monday –Friday from 7:30 a.m. until 5:00 p.m.  Click here for map (pdf, 272 KB)

Levee trails are impassable when wet.  Call 510-792-0222 ext. 363 for latest information. 

The Environmental Education Center building and gates will be closed from December 23, 2018 - January 1, 2019. We will reopen on Wednesday, January 2, 2019. The trails will remain open from sunrise to sunset.