The mapped route begins at Arguello Gate of The Presidio. Limited free parking is available here, either at Presidio Cafe or along Pacific Avenue. If full, you can find street parking in a nearby neighborhood or use public transportation to reach The Presidio.

Almost right away, the trail dips into an impressive woodland of Monterey cypress. Among the tall trees, you’ll suddenly smell damp soil and hear the sounds of birds, even though you’re in the middle of the city. Pause to read the Ecology Trail signs if you want to learn about the area’s history and natural environment. There’s also a 100-foot-tall sculpture inspired by the trees.

After leaving the cypress grove, The route links briefly with a residential street, then enters another patch of forest before passing Rob Hill Campground, the only place to camp inside the city. Next comes the historic sites and ocean views. You’ll pass a World War II memorial, then a few different overlooks where you can see the Golden Gate Bridge. There are several old defense batteries near Langdon Court, and hiking trails leading among them. This is a great place to park the bike and explore for a bit. From there, you can continue to the bridge.

Sources: https://ridgetrail.org/san-francisco-presidio-2/ https://www.presidio.gov/trails/bay-area-ridge-trail