In 1805, Jacob Montrose was a licensed innkeeper who lived at "The Corner", near Mount Pleasant. In 1810, it was held by Jacob Longyear. There was later a railroad station at Mount Pleasant.
In 1880, the Ulster County Manufacturing company operated a pulp-mill in the hamlet. Joseph Degraff ran a pill box factory. There was also James Lockwood's store, Martin Terwilliger's blacksmith shop, John Inglodson's shoe shop, two mills, and a hotel.[2]