Colorado

Coloradois a state in the United States of America.

The Lightning Thief
Percy Jackson, Annabeth Chase and Grover Underwood arrive in Denver, the state capital, and are greeted by Ares. He agrees to get them a ride if they can get his shield from Waterland.

The Battle of the Labyrinth
After escaping Daedalus' Workshop Percy and Annabeth, along with Rachel Elizabeth Dare and Nico di Angelo end up in the Garden of the Gods and search the nearby town, Colorado Springs, for an entrance into the Labyrinth. They find one in the Western Museum of Mining and Industry.