Mt. Umunhum is named after the local First People's name for hummingbird. The radars (now removed) from USAF atop the concrete cube that remains, let to contamination and the road was closed for many years. Mt Umunhum is one of the four major submits of the Bay Area with Mt TAM, Mt Diablo and Mt Hamilton. Coming from the North, Hicks road is a brutal short climb which then without anytime to catch your breath leads to the long brutal ascent of Mt Umunhum with plenty of 10-15% sections.