This week, Hannah takes on her biggest challenge to date. Can she get the cake bakers and jam makers of the Women’s Institute through a gruelling 70-mile triathlon? Hannah has chosen four WI members from the north of England to enter Barb’s Race, a women-only triathlon in the hilly vineyards of northern California. The race involves a 1.2-mile open water swim, a 56-mile bike ride and a half marathon.