One guided tour per Pass.
All year round.
Duration: 1h30 according to schedule on https://www.sainteagnes.fr/le-fort-de-la-ligne-maginot/
Tours at 10.15am, 2.15pm and 4pm.
Pass validation at the Fort entrance.
https://www.sainteagnes.fr/le-fort-de-la-ligne-maginot