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.

Frank Dean, General Superintendent of the Golden Gate National Recreation Area, is the head man at the biggest urban park in the country.

Looking for ways to volunteer in San Francisco to help keep the city green?

Muir Woods National Monument Rediscovers its Natural Soundscape.

A Miracle of Survival! A Franciscan Manzanita--a species thought to have been extinct in the wild for almost 70 years--is rediscovered at a construction site near the Golden Gate Bridge.

Eat too much this holiday season? Burn some of it off with this Crissy Field workout.

Marin creek's $13 million restoration should give boost to coho

List of 10 scenic spots to swim, float and soak in the sun at the West's amazing national parks. Golden Gate National Parks' Crissy Field is ranked "best for a city stroll."

As America's population become more diverse, will its changes be reflected in park visitors?

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.

Betty Lou Vickery, 93, lived on Alcatraz when it was a military prison, visits the Island again.