Can a water cycle ever end

No It cannot.

Explanation:

A water cycle does not have an end as it moves all around the earth

The process:

A water cycle can start by water evaporating through the sun's heat from a water bed, such as: Ocean, sea, pond etc.

The heat from the sun will turn the water into water vapour and will go up into the atmosphere.

The water vapor gets together with other vapors and forms clouds.

These clouds will move around the earth, once they are so full of water they drop the water to Earth in some form of precipitation. It could be rain, snow, sleet, or hail.

These water will form ponds or go back in the ocean and the process wil repeat again.