At Dunderberg Mountain or Caldwell's Landing, what is called the Horse Race commences. This consists of an angle in the river, which for more than a mile, takes a westwardly direction, contracted to a very narrow space between bold and rocky mountains; one of which, Antony's Nose, is eleven hundred and twenty-eight feet high, and is opposite the mouth of Montgomery creek, overlooking forts Montgomery and Clinton.
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Edgar Mayhew Bacon described the Horse Race and Peekskill Bay in The Hudson River From Ocean to Source in 1903: "The Trains that creep about the base of the Dunderberg are pygmy affairs; the swift current that flows through the Horse Race and into Seylmaker's Reach catches broken reflections of the towering masses above them, and all the contrivances of man-his wharves, his boats, and his villages- cannot impair the invincible majesty of nature."