Loading Events

« All Events

  • This event has passed.

Alto Tunnel Discovery Ride

May 18 @ 10:00 am - 1:30 pm

Alto Tunnel rendering
Alto Tunnel Discovery Ride

MCBC and Friends of Alto Tunnel will be jointly leading a family-friendly ride to visit the north portal of the Alto Tunnel. Hear about the history of the tunnel and the community-led efforts to reopen it to bike and pedestrian travel.

We will meet at Edna McGuire ES in Mill Valley at 10 AM, ride over Horse Hill, stop briefly at Peet’s Coffee in Corte Madera, and visit the Alto Tunnel’s north portal. This will be followed by a BYO lunch at Menke Park (there are a number of restaurants nearby for anyone who needs food). Anyone coming from the north is welcome to meet us at Peet’s at 10:45 rather than going over the hill twice.

The whole route will be 7 miles at a gentle pace, though there are some steep sections of road. We will wait at the top of all hills to regroup. Visiting the tunnel portal requires a short walk on a dirt path, so bring closed-toe shoes.

We expect to return to Edna McGuire by 1:30 PM.

Bring: Water, snacks (we will have some on hand), closed-toe shoes, sunscreen.

If you are under 18, or are bringing anyone under 18 on the ride, please print and complete a waiver (linked here) signed by a parent or guardian.

Friends of Alto Tunnel is the volunteer group supported by MCBC that organizes the campaign to reopen the tunnel. We meet monthly, typically on Zoom and occasionally in person in Mill Valley.

Release and Waiver of Liability, Assumption of Risk, Indemnity, and Parental Consent Agreement for League of American Wheelman DBA League of American Bicyclists (LAB)
In Consideration of being permitted to participate in any way in Marin County Bicycle Coalition sponsored Bicycling Activities I, for myself, my personal representatives, assigns, heirs, and next of kin:
1. Acknowledge, agree, and represent that I understand the nature of Bicycling Activities and that I am qualified, in good health, and in proper physical condition to participate in such Activity. I further acknowledge that the Activity will be conducted over public roads and facilities open to the public during the Activity and upon which the hazards of traveling are to be expected. I further agree and warrant that if, at any time, I believe conditions to be unsafe, I will immediately discontinue further participation in the Activity.
2. Fully understand that
(a) Bicycling activities involve risks and dangers of serious bodily injury, including permanent disability, paralysis, and death (“Risks”).
(b) these Risks and dangers may be caused by my own actions or inactions, the actions or inactions of others participating in the Activity, the conditions in which the Activity takes place, or the negligence of the “Releasees” named below;
(c) there may be other risks and social and economic losses either not known to me or not readily foreseeable at this time; and I fully accept and assume all such risks and all responsibility for losses, costs, and damages I may incur as a result of my participation in the Activity.
3. Hereby release, discharge, and convent not to sue the Club, the LAB, its respective administrators, directors, agents, officers, members, volunteers, and employees, other participants, any sponsors, advertisers, and, if applicable, owners and lessors of premises on which the Activity takes place, (each considered one of the “Releasees” herein) from all liability, claims, demands, losses, or damages on my account caused or alleged to be caused in whole or in part by the negligence of the “Releasees” or otherwise, including negligent rescue operations. And, I further agree that if, despite this Release and Waiver of Liability, Assumption of Risk, and Indemnity Agreement I, or anyone on my behalf, makes a claim against any of the Releasees, I will indemnify, save, and hold harmless each of the “Releasees” from any litigation expenses, attorney fees, loss, liability, damage, or cost which any may incur as the result of such claim.
4. Photographs and/or video will be taken at the event. By taking part in this event you grant the event organisers full rights to use the images for fundraising, publicity, social media, or other purposes.
I am 18 years of age or older, have read and understand the terms of this agreement, understand that I am giving up substantial rights by signing this agreement, have signed it voluntarily and without any inducement or assurance of any nature and intend it to be a complete and unconditional release of all liability to the greatest extent allowed by law. I agree that if any portion of this agreement is held to be invalid, the balance, not withstanding, shall continue in full force and effect.


May 18
10:00 am - 1:30 pm


MCBC – Road Advocacy
View Organizer Website

Putting on a bike-related event?

Please let us know about it! Use this form to share information about your event so that it appears here in the Marinbike.org Event Calendar.