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sailquik said..I am always amazed that so very few good speed spots have been discovered or explored in North America. I am sure they are there. It just seems that enough enthusiasts willing to explore and sail them are not.

The spots are there, the speed sailors are not. Here's one near Provincetown on Cape Cod:

The line is 750 m long. The sandbar is maybe 2-3 ft above water at high tide. Currents are pretty strong there due to a 10-12 ft tide, but it should be ok for 2 hours around high tide in SW wind. But access during the summer is limited (very little parking nearby at $25 US per day). Space to get back is a bit limited, especially if wind direction would permit broad runs. I've never been able to convince anyone to explore it with me.
Here's a km long strip on Long Island:

I've seen videos of windsurfers on freeride gear there. It requires sailing a few km through chop to get there (or a boat).
Here's our own Sandy Point in Rhode Island:

That one has been sailed by speedsurfers a few times, although top speeds were usually only in the high 30s. It requires sailing more than a kilometer upwind through chop to get there from the public launch. The island is a bit high so it affects the wind some. The biggest issue is that any south wind in this area is very up and down, and strong winds usually do not last long. Here's the wind meter from our last trip there 7 years ago:

Since it takes a while to get to the island, I ended up being always on the wrong sail size that day. Of the 4 of us sailing that day, one guy set a PB of 37.7 knots that day, and he was a way faster windsurfer than I was back then. Makes me appreciate how nice it is to be able to launch directly into flat water at places like Coodanup, Albany, or LG, without having to go upwind throw 2 ft of chop first

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