look at my app and examine the Streetcar Routes section. This will allow you to look at every streetcar route that ever existed in the modern city proper and filter them using a time slider to see what routes existed during any given year.

Once upon a time, there were no cars in Denver. In 1861, when the city was incorporated, people traveled around town either by foot or by horse. By 1870 the town had grown to a population of about 4,700 people and became large enough to make walking from one side to the other time consuming. Not everybody had the luxury of getting around by their own private or hired horse. In 1872 the Denver Horse Railroad Company built the first public transit line in Denver.It consisted on a horse drawn rail carriage going from Auraria to modern Curtis Park.

By 1880 the trackage had expanded modestly, perhaps doubling in total length, covering an area from Broadway at Speer to Larimer at 33rd going north-south, and Federal to Ogden going east-west. The population in this time however had ballooned seven-fold to 35,000. News reports at the time lamented the inadequate state of the network. In the face of pent-up demand and continued population growth, the 1880s saw the biggest single-decade expansion of the network in its 78-year history.

By 1890, when the population tripled to 106,000, nearly every block in downtown and modern Five Points/RiNo had a streetcar line. Lines covered the full length of Broadway and Colfax, and the northwest side around Berkeley had