Not all multi-day ultras are stage races. Have a look at the Tor des Geants (tordesgeants.it). Unlikely the Berkeley, you have a good chance of finishing. But i

Not all multi-day ultras are stage races. Have a look at the Tor des Geants (tordesgeants.it). Unlikely the Berkeley, you have a good chance of finishing. But it basically involves almost no sleep for a week. I did it a couple of years back and got 16 1/2 hrs sleep in 138 hrs. Bonkers but utterly brilliant...