Mount Vernon was founded in 1859 by Dr. Joseph Casto who followed the gold rush to Colorado in 1858.
He did not find gold, but decided to establish a town between the mining camps and the city of Denver.
[1] After gold ore was discovered near Central City in 1859, a trail was established through Mount Vernon.
[2] One of the town's citizens was Robert Williamson Steele, the governor of Jefferson Territory, who often worked out of his Mount Vernon house.
[2] Its cemetery still exists on the Village Trail within the Jefferson County Open Space.