A growing debate in Marin County focuses on bicyclists seeking wider access to single-track trails in the local watershed. Critics argue that these trails are vulnerable to erosion and that increased traffic could disrupt the Marin Municipal Water District’s primary mission of providing clean drinking water.

A new pilot project by the Marin Municipal Water District proposes opening several single-track trails to mountain bikes, sparking fierce debate. A recent letter from Sharon Tilley accuses conservation groups of acting in bad faith for filing a CEQA lawsuit after a long consultation process.