THE GREAT VOYAGE OF LEWIS AND CLARK
 
 
 
 

Mississippi River (Iowa)

 
 
 
 
 
 
 
 

Buffaloes


 
 
 
 
 

OBSTACLES

Mountains
(Bitteroots)
(Idaho)

 
 


 
 





Lakes and Mountains block the way

 
 
 
 
 
 
 
 

Forest Fires