Lack of sleep adds to challenge

Racing with Frederico in my head.

Rebecca Rusch first raced La Ruta de los Conquistadores in 2006.  She's back for her second attempt at the race.

The three-time 24-hour solo world champion has raced several endurance events this season including the Trans-Sylvania, Trans Andes, Tour de la Patagonia, Red Centre Enduro and the Leadville 100, which she won while also setting a women's course record.

The 42-year-old Rusch lives in Ketchum, Idaho.

Follow her daily race blog here.