PBS
Pbs the West: Charles Goodnight
Charles Goodnight (1836-1929) was one of the most prosperous cattleman of the American West. Read a thorough biography about him here at this site.
Houghton Mifflin Harcourt
Harcourt: School Publishers: Join a Cattle Drive
At this site take a look at maps of cattle drives from the ranches and ranges of Texas to the market places in Kansas, Nebraska, Colorado and Wyoming.
Other
Southwest Collection: The Texas Ranching Frontier
Discusses the cattle drive era that occurred in the late 1800s. It gives details about the drives from Texas to the north.