Distance and use of designated roads and trails in the Marin County Open Space District.

Percent of Northern Spotted Owl pairs with known successful nests each year, as surveyed by the National Park Service and Point Blue Conservation Science. Data are collected on California State Parks, Marin County Parks, Marin Municipal Water District, Municipal, National Park Service, and private lands.

Proportion of Northern Spotted Owl nest trees by species, from 1997 to 2018, for 584 nest sites monitored by Point Blue Conservation Science and the National Park Service throughout Marin County.