Moonlight Wanda

A wilderness icon's old stomping ground is yours to explore under a full moon: Just south of John Muir's historic farmhouse in Martinez, Mount Wanda (named after one of his daughters) is now run by the National Park Service. During summer, park rangers host free monthly moonlight walks up to the 642-foot peak. The trail ascends gradually through grasslands with deciduous oak trees that branch out to humpback hills. Along the way a ranger will stop to recite famous John Muir quotes that sound even more poetic on a night hike through his former estate. With good timing you'll be near the top to see the sun set just as the moon rises above Mount Diablo. For an up-close look at the moon (is it really made of cheese?) peer through a 10-inch reflecting telescope set up at the summit by a volunteer. Stay awhile and enjoy the views. Then head back down the way you came, with the moon as your lantern.

Mount Wanda is part of the John Muir National Historic Site. The next full-moon hike is Aug. 24 at 7 p.m. There is no fee to attend. Reservations are required: call 925-228-8860. Visit the Web site for directions. Bring a flashlight or a headlamp—some sections are not moon-filled. No dogs.