Here's why:

* Earth's Tilt: The Earth is tilted on its axis at approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of direct sunlight throughout the year.

* Tropic of Cancer: The Tropic of Cancer, located at approximately 23.5 degrees north latitude, marks the northernmost point where the sun can be directly overhead. This occurs during the June solstice.

* Colorado's Latitude: Colorado is located between approximately 37 and 41 degrees north latitude. This is north of the Tropic of Cancer, meaning the sun never reaches a position directly overhead.

Therefore, while the sun can be high in the sky in Colorado during the summer months, it will never be directly overhead.