I have a couple of questions.

Is this a correct way of saying I like to ride a bike in the summer? Do I need an article before été?

En été, j'aime faire du vélo.

Is l'opération male or female?

How do you say I like to visit different places in the holidays?

2 answers

I'll send this to our French expert, SraJMcGin.
First sentence is perfect! No, no article with été here.

Handy hint: all words ending in -tion are feminine.

J'aime visiter des endoits différents pendant (during) les jours de fête. (in = dans, if you prefer)

Sra (aka Mme)

I'll "flag" this so I can come back later, in case you have other questions.