Now that I'm retired I'd like to be able to cross Mt. Diablo, Mt. Tam and Mt. Hamilton off my bucket list. Since I'm just increasing mileage and climbing I'd like to contemplate them in order of difficulty recognizing the subjectivity involved. I've done three of the longer climbs further south: Fremont Peak (tandem only), Lone Tree and Henry Coe. I suspect all of these are a notch below the three official mountains, but they are not easy. I've run up both Mt. Hamilton and Mt Umunhum decades ago. I suspect Umunhum from Hicks wouldn't be considered much of a climb on a bicycle: less than 5 miles and a steady grade.