Welcome to the...
Denver Interactive Timeline

You are about to enter the timeline!

Scroll down to learn more about how Denver became what it is today.


Denver has a rich history of geology, climate, and culture.

Uncover years of Colorado front range history through our interactive timeline. Geologic, prehistoric, settlement, developmental and modern times will be highlighted as you scroll through this page. We hope you find something new about our lovely state and hope to inspire you to find out more. Now, just keep scrolling, and enter the millions of years that have shaped the Colorado front range.

Keep scrolling down to see more!

This is a sideways scrolling website. If you keep scrolling down, the page will scroll to the right.

Geologic Time

About 300 Million Years Ago...
In the earth’s early history, a mega continent Pangea was formed from the collision of two large land masses. This collision created the Rocky Mountains and the land we know today as Colorado.
Learn more!


3 Million Years Ago
Once the Earth settled, the Front Range and its landscape became a hotspot for ancient animals and early people alike. Finding a home in the Rocky Mountains, large mammals like mammoths came and went as the Ice Age happened and humanity began to thrive.
Learn more!


Starting in the 1800s, Colorado went from a plot of land “owned” by the French to a provisional territory and then finally became a state. Along with the changing environment, the state’s communities, government, and people transformed.
Learn more!


1890s - 1970s
The late 19th to early 20th century was extremely developmental in the state of Colorado as railroads expanded the state and created towns and economic opportunities. The rise in transportation also led to the beginning of Colorado’s high peaks attracting people from all over the globe to see their natural beauty.
Learn more!

Modern Denver

The Present
Denver offers its lively art scene, great food, excellent sports, and beautiful landscapes. Although the state has experienced hardship, its popularity and central hub status in the United States haven’t changed.
Learn more!