As described by the Midpeninsula Regional Open Space District: "Overlooking the town of Los Gatos and the south bay, Sierra Azul Open Space Preserve is the District's largest preserve, encompassing over 17,000 acres of mostly rugged and steep terrain. The environment of Sierra Azul is strikingly varied. One can visit serpentine grasslands, hard, rocky, and steep chaparral, dense stands of bay trees, or quiet, shaded oak woodland forests. For the more hardy explorers, there are deep ravines and riparian corridors, some containing seasonal or year-round water flow. Wildlife is abundant in Sierra Azul. The entire Preserve is prime mountain lion habitat and also provides homes for deer, bobcats, coyotes, and many other species of animals. Sierra Azul ("Blue Range") is a true wilderness area, yet surprisingly close to the urban areas of the South Bay, making it a popular destination."

mountain biking
2 days ago

I was convinced Briones had rolling hills.. nah this place took the CAKE!! hills on hills on hills on more hills!! i loved every it of it! when you reach the peak, you can even see Mt Diablo and Tamalpais from there! it's so awesome! definitely added this to my Favorite hikes list!

Most recently the Mt Umunhum road is closed. So you can't go further at the point when you must go on Barlow Road to return to Mt Umunhum road. Thus this trail is not a loop anymore.
Anyway, the trail is perfect. It has a lot of shades and it's very comfortable. Not crowded. Good view!

This place was very nice. I went in the fall and it was quite lush and green. Some nice scenic views and wildlife viewing. I spotted quite a few salamanders along the trail.