Alto Tunnel Study

The Alto Tunnel Study is an effort to collect information on the feasibility of reconstructing the Alto Tunnel for potential future bicycle and pedestrian use.  The County is the lead agency in partnership with and with the cooperation of the City of Mill Valley and the Town of Corte Madera.  At this time, no decision has been made to reconstruct the tunnel. The County is gathering technical information and details requested by decision-makers to help them make an informed decision about whether to initiate this project or not.

Please visit the Alto Tunnel Study website for more information.

On December 4, 2000, the Mill Valley City Council adopted Resolution No. 00-36 “Endorsing a Feasibility Study to Determine Whether Reestablishing the Alto Tunnel for Pedestrian and Bicycle Use Represents a Prudent Project in Furtherance of the Marin County Bicycle and Pedestrian Master Plan.”

Download: Resolution No. 00-36 - Alto Tunnel