How to say what you're going to do.
On va marcher pendant une heure et demie.
Nous allons prendre le GR98 ?
On va aller jusqu'à la Grande Candelle.
The French way of saying what you're going to do has the same pattern as English. You start with je vais, on va, nous allons etc (the present tense of aller) and follow it with another verb like marcher, prendre, finir (the infinitive form of the verb).
The French term for this is le futur proche- the near future- because, like the English equivalent, it's often used to say what you're going to do or what's going to happen shortly.
If there are words like "him", "her", "us", involved (object pronouns), they come in front of the second verb: