Richard Arlen
— Capt. Robert Lawrence
Andy Devine
— Slim Collins
Constance Moore
— Helen Bailey
Noah Beery
— Captain of the 'Blackhawk'
Guinn 'Big Boy' Williams
— Blake - the First Mate
Mala
— Wani - Native Slave Leader
Thurston Hall
— Sam Bailey
Sandra Kane
— Tania Bailey
Paul Fix
— Jock - a Sailor
Richard Lane
— Kit Carson
Mabel Albertson
— The Widow
Charles Trowbridge
— Gen. Fremont
Peter Potter
— Sailor
Byron Foulger
— Coombs - a Sailor
Francisco Marán
— Gen. Romero
Eddy Waller
— Parson
Mamo Clark
— Mamo
Budd Buster
— Settler Joe
Harry Cording
— Bos'un
Jim Farley
— Ship's Officer
Martin Faust
— Helmsman
Martín Garralaga
Octavio Giraud
Tenen Holtz
Bernard Kikume
Edward LeSaint
— Leader of Protesting Settlers
Ben Lewis
— Colonel's Orderly (uncredited)
George Lloyd
— Ship's Officer
Murdock MacQuarrie
— Bill - a Settler
James C. Morton
— Ship's Cook