Guided walks take place rain or shine. There are no ticket exchanges or refunds for cancellations, no-shows, or late arrivals. 

Refunds are issued only when the park cancels a walk. As much notice as possible will be given in the event of a cancellation.

If for any reason you decide not to use your tickets or know you will be arriving late, please notify the park at (650) 879-2025 as soon as possible. This communication is very helpful to park staff so that they can assist other groups, notify docents assigned to your group, or notify people waiting to get a spot on a guided walk. You can also email us at ano.volcoordinator@parks.ca.gov to let us know.