Tucked in the Marin Headlands, Tennessee Valley opens a clear plain to the ocean through the scrub and grasses.

Difficulty: Easy to Moderate

With stunning views of the Golden Gate Bridge and San Francisco beyond, Hawk Hill Trail brings visitors to the top of the Marin Headlands. During migration season, Hawk Hill lives up to its name with dozens, sometimes hundreds, of hawks spotted in a day. Wheelchair accessible.

Difficulty: Moderate

A wonderful loop hike on Mt. Tam with a stop at the historic West Point Inn for lemonade or a snack and a panoramic view.

This mellow hike was a joy in spring: wildflowers everywhere, great views, no fog. We chose the hiker-only trails where we could, but bike routes cover similar ground.

Restored in 2001, Crissy Field wasted no time in becoming a San Francisco icon and a gem of the Parks Conservancy. The former military airfield now sports a clean, smooth promenade with views of the Golden Gate, Alcatraz, and the North and East Bays.