Once you discover the fire trails of the Headlands you find all manner of new vistas and secluded locales tucked away only a few miles from familiar bike locales you've likely already explored. Hawk Camp is one of those discoveries. It is accessible via fire trail that starts from Bunker Rd. through the headlands tunnel or alternatively a short trail ride from Tennessee Valley Rd. It's a bit of a leg burner but rewards abound. Once you arrive and climb the last hilly bit to the camp, you'll be treated with a panoramic view of the the Golden Gate Bridge and nearly all of San Francisco. A short hike up the hill behind the site reveals some impressive single track and panoramic views of Mt. Tam, the Pacific, East Bay, San Francisco---EVERYTHING! It's so expansive and so close-- really one of the most surprising and pleasant discoveries in Bay Area camping we've found in years.
You'll need to make reservations as there is no hiker-biker, but they are generally easy to secure from the National Park Service's headlands outpost. See the Website link above for the reservation line.