Mt. Umunhum

The Great Box in the Sky

The radar tower in its current condition. © Copyright Basim Jaber - Almaden AFS Archives –

The Ohlone named it for hummingbirds, the Air Force built a radar station on its peak, and now MidPen is turning Mt. Ununhum into a park.

Sierra Azul

Silicon Valley seen from Bald Mountain. Photo by Diane Main/CC.

Beautiful and rugged chaparral mountains surrounding Mt. Umunhum.

At Home on Sierra Azul’s Priest Rock Trail

The Priest Rock Trail to the 3,000-foot summit of Mt. El Sombroso in the Sierra Azul Open Space Reserve leads to great views of Los Gatos and the South Bay Area.