I finally registered for the Mount Diablo Challenge. It's a tough task to climb 3,249 ft over 11.2 km under 1 hour. But I am taking the challenge. Have 3 months for preparation. Unfortunately because of the delay in registering I missed the first 2 waves.
http://www.savemountdiablo.org/activities_events_chal.html
http://www.savemountdiablo.org/activities_events_chal.html