The redwoods in Muir Woods provide ideal Coho Salmon habitat, providing woody debris to protect young salmon in the creeks and keeping them shaded and cool. But the Coho in Muir Woods Redwood Creek are endangered, and local biologists and volunteers are working to protect the salmon and restore their habitat.

Over a million visitors tour Alcatraz every year, but a recent discovery has revealed another attraction that lives within the shadows of this historical prison: glowing millipedes of Alcatraz.

Spotted owls are one of the most iconic threatened species in the West. But despite two decades of work to bring them back, their numbers are still declining. That may be due in part to a new threat - not from humans, but from other owls.

Spotted owls are one of the most iconic threatened species in the West. But their numbers are still declining that may be due in part to a new threat, not from humans, but from other owls.

Following a 71-hour closure of the roads connecting the Golden Gate Bridge with the Marina District, the Presidio Parkway opened to traffic Sunday night and will soon be transformed into the city’s newest parklands by the designers who created New York City’s elevated High Line park.

What a difference a year makes. Last September, all eyes were on the bay for the America's Cup, starring Larry Ellison. This year, we're casting our glances in the same direction to Alcatraz, for the exhibition of the dissident Chinese artist Ai Weiwei.

Alcatraz has more stories than its dark past as America's most feared prison. One part of its history is the Indian occupation from the winter of 1969 to the spring of 1971, when a band of American Indians seized the island after the prison closed. They hoped to turn it into an Indian cultural center, or perhaps a small university devoted to native studies.

Thursday is a red-letter day in the history of Alcatraz Island - the 50th anniversary of the day the prison closed. It was the end of one era and the beginning of another.

The largest cash gift in national parks history is intended to be the catalyst to create 10 acres of parkland connecting the heart of the Presidio to Crissy Field and the bay.

Four government agencies and a nonprofit support group--the National Park Service, California State Parks, the Marin Municipal Water District and the county of Marin--have bonded together in an unusual agreement to help preserve and protect Mount Tamalpais, Marin County's signature mountain.