Castle Rock, Kansas, on the Smoky Hill, 385 miles west of Missouri River. - from our story 'Across the Continent on the Kansas Pacific Railroad in Photographs – 1867' Castle Rock, Kansas, on the Smoky Hill, 385 miles west of Missouri River. View The Article THE FLASHBAK SHOP Visit the shop Great T-ShirtsDiscover Our 100% Organic Cotton T-Shirts Discover Our PrintsExplore our Prints Shop Editor’s picks Collect our postcards Free Newsletter First Name Last Name Leave this field empty if you're human: Shop our comfy T-Shirts