Tackling the climb to Mount Umunhum via Hicks Road near San Jose, California, is an iconic Bay Area cycling challenge, infamous for its brutally steep sections but rewarded by incredible panoramic summit views and unique Cold War history. You'll first confront the legendary Hicks Road 'wall', grinding up relentless pitches frequently exceeding 15% and hitting 20-25% or more over its approximate 5-mile main ascent. After cresting the main Hicks climb, you'll turn onto the well-paved Mount Umunhum Road for the final ascent to the 3,486 ft summit area; this section feels much steadier, averaging around 5%. Enjoy the transition from oak-studded canyons to expansive views over Silicon Valley and surrounding ranges from the historic radar tower base.