which sentence is correct?

I like to ride my bike IN the park.

I like to ride my bike AT the park.

Both are o.k., but I prefer "in the park."

In the park would be the best answer.

Both sentences are grammatically correct, but the choice between "IN" and "AT" depends on the intended meaning.

If you want to emphasize that you enjoy cycling within the boundaries or designated areas of the park, then "I like to ride my bike IN the park" is more appropriate. This implies that you are riding your bike on the trails or paths specifically designed for biking within the park.

On the other hand, if you want to indicate that you ride your bike near or in the vicinity of the park, without necessarily being inside it, then "I like to ride my bike AT the park" is more suitable. This could imply that you ride your bike on the streets around the park or in nearby areas.

In order to choose the correct preposition, it is important to consider the context and the specific meaning you want to convey.