The Pony Express (The Central Overland California and Pikes
Peak Express) only lasted for 18 months and ended in October
1861 with the development of the telegraph. Since it was so
expensive to send mail, around $5 per ounce, it was generally
reserved for businesses and official correspondence rather than
personal mail. Riders were responsible for carrying the mail the
relatively short distance of about 32 kilometers (20 mi), and
most riders were boys.