The Dillingham Parking Lot (northwest corner of the Golden Gate Bridge) is closed due to construction March 1st through April 15th, 2011. 

Also, Conzelman Road is closed to all traffic - including bicycles - from Battery Spencer to the new roundabout @ McCullough April 1st through June 15th, 2011.

The Conzelman Road reconstruction is part of one of the most significant highway improvements in the history of the Golden Gate National Recreation Area, and is part of the comprehensive Marin Headlands and Fort Baker Transportation Infrastructure and Management Plan.  Part of the work includes the restriping of the road, as well as improvements of access and safety for bicyclists, motorists and pedestrians on 11-miles of historic roads and trails.

Visit http://www.projectheadlands.gov/closuresanddelaysroads.htm for a map & details of road delays and closures.