However, here are some options that could be used:
* A group of hikers
* A band of hikers
* A party of hikers
* A throng of hikers
* A trail of hikers (referring to a group following a path)
* A cluster of hikers
* A company of hikers
You can also be creative and use less common collective nouns like:
* A pilgrimage of hikers
* A fellowship of hikers
* A legion of hikers
Ultimately, the best collective noun to use will depend on the specific context and the tone you're aiming for.