My college buddy and I drove in a 77 Ford Pinto from Los Gatos to the south rim of the grand canyon and got there right at day break. Hours through the desert at night was brutal in trying to stay awake (and find open gas stations). We'd been up for 24 hours but I don't think it was a problem as the sun was coming up over this breath taking place. The Pinto by the way broke it's timing belt the day after we got back to Dallas.