90 Day beyond Schengen agreement between France and US?????

I've never heard of that before.

You say you recently read it. Where?

I have heard of this but it it not a 90 day extension to a regular 90 day visit. The 6 month visa requires your obtaining special permission which is not unlike an ordinary 1 year visa. It´s a lot of work and expense for only 6 months. You´ll need to make an appointment at the appropriate French embassy or consulate and complete the requirements which include, but are not limited to proof of medical insurance, adequate financial resources, and background checks.

Yes, apparently it is true. Talk to your closest French consulate or embassy.

You can stay 90 days in Schengen, leave to a non Schengen country, and then return directly to France and stay an additional 90 days. You must then return directly home to a non Schengen country. You are supposed to stay in France during the additional 90 days. You cannot work. You may be required to show proof of financial situation that will cover your expenses plus insurance for the time you are in France.

I am vary dubious about this. Entrance rules are agreed internationally as part of the Schengen Treaty. Any country letting people in above the limits would cause a row with the others.
"During that time, they are not permitted to leave France" - how do you stop them?

What you are perhaps confusing this with is a residence visa. Each country has their own rules about who they issue residence visas to, and under what conditions (is working allowed?). A residence visa only allows you to live in that country, you are still limited to 90 days in the other Schengen countries.

Can anybody provide a link to a (reliable) website that says this?

Since the information found so far on the net is not from the French government, that is why I stated to consult with the embassy or consulate. And just like any other entry into France, or other European country, you may be asked for details such as your financial situation at time of entry.

Sure, it is difficult to stop someone from exiting France into the surrounding countries. But, for example, if you get stopped by the police outside of France after the 90 day Schengen limit, you will probably be fined and forcibly sent home for exceeding the Schengen limit if there is no actual visa to show that would allow your extended time.

https://travel.state.gov/content/travel/en/international-travel/before-you-go/schengen.html

Let me see if I am understanding this. If I wanted to stay in the Schengen zone for between 90 and 179 days, I could spend the first 90 days anywhere in the zone and then on the 90th day cross the border into Poland, Denmark, or France and stay in that country for 90 days. After that I would have to exit the Schenegen zone. If so must my immediate destination be home, or could I head to Britian for 180 days and then return to the Schengen zone?

I just read the Denmark exception. It's complicated. Anytime spent in a Nordic country in the 180 days prior to the 90 day extension is deducted from the 90 day extension:

"Irrespective of whether they may have stayed in another Schengen State
prior to entering Denmark, nationals of Australia, Canada, Chile, Israel, Ja-
pan, Malaysia, New Zealand, Singapore, South Korea and the United States of America (USA), with which Denmark has bilateral visa exemption agree-
ments, have the right to freely enter and stay in Denmark for up to 90 days
reckoned from the date of their first entry into Denmark or another Nordic
country. The time the foreign national has stayed in Denmark or another
Nordic country within the last 180 days will be deducted from the men-
tioned 90 days."

It is true for Denmark:
https://www.nyidanmark.dk/NR/rdonlyres/DBCBF916-FDF6-4209-AFFB-027416AB394B/0/overview_travel_documents_04042017.pdf

V. Stay in Denmark after a stay of 90 days in another Schengen State

Irrespective of whether they may have stayed in another Schengen State prior to entering Denmark, nationals of Australia, Canada, Chile, Israel, Ja- pan, Malaysia, New Zealand, Singapore, South Korea and the United States of America (USA), with which Denmark has bilateral visa exemption agree- ments, have the right to freely enter and stay in Denmark for up to 90 days reckoned from the date of their first entry into Denmark or another Nordic country. The time the foreign national has stayed in Denmark or another Nordic country within the last 180 days will be deducted from the mentioned 90 days.

Can anyone confirm this?

The French Embassy/Consulate office

This would be a good place to provide a reference to the source providing that information.

Otherwise, you can work with your prevailing French consulate to work through the paperwork and obtain a valid visa for a longer stay.

You can't return for another 90 days though.

I would email the French Embassy in DC to confirm.
https://franceintheus.org/spip.php?article1131#01

I have just sent an inquiry to French Embassy and will share results when I hear back. Thank you all for your feedback.
Sally

What did you find out?

Somewhere I learned about an additional 90 day visa which requires one to purchase medical insurance overseas policy. Haven't look into it further as my travel plans have evolved elsewhere. Interested in learning more.

This is all quite interesting; I look forward to someone nailing it down. Getting an extended visa is a real pain so this would be great for many people if it is in fact possible t do.

Never heard back from French Embassy and energies diverted elsewhere but very interested in details for future travel if someone has time to nail them down. Thanks.

Why don't you phone the French Embassy, asking for the Visa Section. One phone call won't take up much of your time. The nearest French Consulate might work for you, too.

The way to check this is to exit the Schengen Area on day 90 to somewhere nearby, say the UK, and then a few days later try to get a train from London to Paris. The Schengen immigration check is done at St Pancras station in London by a French immigration officer.
See if they have heard of this special exception for US citizens going to France.

That is, AFAIK, the only way to enter the Schengen Area, directly to France, on a land border. All other ways in are via other Schengen countries, or involve flying. In the latter case it is an airline employee who checks your passport, and they are very unlikely to know this rule (if it exists).

Looks like the webmaster has done some 'house cleaning'....?

Earlier today I reported it as questionable.