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.

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.

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.