The trampled and eroded soils of the San Geronimo Valley’s most popular old-growth redwood grove have diminished the resiliency of the forest. Now, a major restoration of the Roy’s Redwoods Open Space Preserve will decommission the vast network of informal trails in the 300-acre preserve and reconnect Upper Larsen Creek to its floodplain, restoring the area’s ecology and hydrology. A draft Initial Study/Mitigated Negative Declaration for the project, released last week by the Marin County…