Do the lakes have the same quality as the saunas? Searching online shows it's predominately older people at the lakes

There's plenty of hot girls naked at lakes if that's what you mean. But if you try to sit as close to them as you would in a sauna you're going to out yourself as a creep pretty quickly.

My favourite nudist lakesFreiburg are „kleiner opfinger“ and „Nimburger“.
Google for more information…Lots of young people!

American Women in Saunas
 

Curious if anyone can explain this to me. The Taunus Therme is in Bad Homburg just outside Frankfurt. Back when military bases were all over Germany it wasn’t uncommon to run into American women in the sauna area. It always cracked me up when they had no problems being naked, at least until they found out I and/or my friends were American. Once that happened they’d cover up. I didn’t gawk and was always trying to be very respectful.

Other Americans were mostly colleagues, and the ladies didn't want to be seen later on base. Also, many women care less about being seen by strangers than by people who know them.

Still in doubt what to visit (I drive there on Tuesday and back to Belgium on Thursday). Both days have rainshowers expected.

Options:
- both these lakes, as they are next to the road.
- Bad Ke*del
- Badep*radies Schw*rzwald
- Cassiop*ia

I will visit Badep*radies Euskirchen on the way back, but am tempted to visit Schw*rzwald on the way there as the weatherforecast isn't that great.

Correct, Both lakes are near the road, so if the weather allows, you could Check These out. Opfinger lake is very close to K-Bad, so you have a fallback option in case its disappointing due to the weather.

Beware: there are two lakes opposite to each other. The smaller one is typically >70% nude and 15% topless. The larger one also has a nude part but not That Big.

Do we have a list of spas here that are FKK spas?

Does that mean that the saunas and pools are naked, a towel in the restaurant and maybe they only have a day or two of bathing with clothes on?

That's going to be impossible as litteraly every one in Belgium, Netherlands and Germany will be on there.

add Switzerland, Austria and Luxembourg to that list.

I think, you best research the FAQ section of any given spa, and it usually details their clothing rules.

Example:
https://www.badeparadies-schwarzwald...nformation.php

"textile-free" or in german: textilfrei