Connecting Marin County & the Bay Area

Friends of Alto Tunnel is a volunteer-led community group working to reopen Alto Tunnel to provide people of all ages and abilities the freedom to choose a safe, car-free way to walk and bike between northern and southern Marin, making commuting and reaching more areas of Marin County easier and more enjoyable for everyone.

Sign Our Petition

Two Friends of Alto Tunnel leaders have challenged our supporters to match them up to $10,000 for the next phase of our campaign! Your gift will directly support grassroot efforts to deliver our call to action to our elected officials and the general public.