Lake Texoma

No route to coast. One would have to haul and ship it.

One thing to also be aware of is that the Red River feeding Lake Texoma has a good bit of salt, enough that the lake itself while being no where near a coast is technically brackish water with around 1.0 ppt salinity. Brackish is 0.5 to 30 with anything over 30 being salt water. So, if someone tells you their boat has only been on Texoma so only used in fresh water, that's not technically true.

Had never heard that, doesn't mean its not accurate. Wondering if that was a reading after a springtime flood event up stream. Most of the year there is little to no current on the river hundreds of miles upstream.

The Red River is salty. The saltiness is caused by a natural phenomenon that dates back to ancient times. About 250 million years ago, an inland sea blanketed parts of what is now those states. As time passed, that sea evaporated, leaving salt deposits – mostly sodium chloride. Rock and silt eventually buried the deposits, but the salt continues to leach through natural seeps in tributaries above Lake Texoma, sending as much as 3,450 tons of salt per day flowing down the Red River
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Over the years there's been a lot of discussion as there's a water shortage for the cities along it's banks, but the effort required to remove salt and create usable water has always been the challenge. It's been measured regularly. Just barely into brackish on Lake Texoma.