The trio are inspired to step out of their own comfort zone as they prepare to emulate Isabella’s most impressive feat - summitting a 14,000ft mountain.

Ruby Wax, Mel B and Emily Atack off-road through Utah and trek the mountains of Aspen as they investigate the meaning of the American Dream.

Three trailblazing women, Ruby Wax, Mel B and Emily Atack, retrace the famous footsteps of intrepid Victorian explorer Isabella Bird through the Rocky Mountains of Colorado.