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.
Marin IJ Readers’ Forum for Sept. 17, 2025

Key Takeaways:
- Bicyclists want access to single-track trails in Marin’s watershed.
- Concerns center on steep, narrow, and erosive trail conditions.
- MMWD’s top priority is safeguarding clean, potable water.
- Many wonder if recreation can coexist with conservation.
- The community debate continues over balancing environmental care and outdoor activity.
The Debate Over Trail Access
Marin County’s outdoor enthusiasts have long cherished the extensive network of trails that cut through its scenic watershed. Recently, a debate has emerged: Some bicyclists argue that they should be allowed to ride along the more restrictive single-track paths. This desire for expanded access has ignited questions about whether the watershed terrain can withstand heavier use.
Environmental Concerns
Opponents of broader access point out that the single-track routes in question tend to be steep, narrow, and prone to erosion. “It’s clear that bikes damage watershed land,” reads a letter in the Marin Independent Journal, warning that increased traffic on these sensitive areas could accelerate wear on a vital water resource. The concern is that long-term harm could compromise not only the land itself but also the region’s water quality.
MMWD’s Core Mission
Central to the dispute is the Marin Municipal Water District’s mandate: to provide clean, potable water to its service area. Critics suggest that allowing more bicycle traffic detracts from this mission. The presence of heavier foot and bike traffic could necessitate additional maintenance and water quality measures, potentially straining resources. MMWD’s position reflects a cautionary principle—ensuring that recreation does not undercut its responsibility to safeguard the water supply.
Response from the Community
Views on this issue vary. Some local cyclists argue that the trails can be responsibly managed with proper education and trail upkeep. Meanwhile, residents near the watershed fear that new erosive damage could emerge if cyclists traverse areas never intended for heavy traffic. The District’s role in balancing these perspectives is complicated by a strong public interest in both conservation and outdoor recreation.
Looking Ahead
The question remains whether it is possible to reconcile recreation with environmental protection in Marin. While no definitive resolution has come to light, the community’s robust dialogue signals a collective desire to preserve water resources and maintain diverse opportunities for outdoor activities. How public officials and advocacy groups decide to move forward will likely shape the future of Marin’s watershed and its treasured trails for years to come.