Jeptha Knob is the highest point in the Bluegrass region

Bluegrass region

The Bluegrass Region is a geographic region in the state of Kentucky, United States. It occupies the northern part of the state and since European settlement has contained a majority of the state's population and its largest cities....

 of Kentucky

Kentucky

The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...

. It is located in Shelby County, Kentucky

Shelby County, Kentucky

Shelby County is a county located in the U.S. state of Kentucky. As of 2010, the population was 42,074. Its name is in honor of Isaac Shelby, the first Governor of Kentucky. Its county seat is Shelbyville...

, about eight miles east of Shelbyville

Shelbyville, Kentucky

As of the census of 2000, there were 10,085 people, 3,822 households, and 2,549 families residing in the city. The population density was 1,333.5 people per square mile . There were 4,117 housing units at an average density of 544.4 per square mile...

 near the hamlet of Clay Village and rises some 300 ft (90 m) higher than the surrounding rolling farmland. The Kentucky historical marker at its base calls it a "cryptovolcanic structure", but it is now believed to be the result of an asteroid

Asteroid

Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

 impact some 425 million years ago. There are four points in the area that contend for the highest point. The location and elevation given here is that of a National Geodetic Survey

U.S. National Geodetic Survey

National Geodetic Survey, formerly called the U.S. Coast and Geodetic Survey , is a United States federal agency that defines and manages a national coordinate system, providing the foundation for transportation and communication; mapping and charting; and a large number of applications of science...

 benchmark

Benchmark

-Geology:*Benchmark , a point of reference for a measurement**Benchmarking , an activity involving finding benchmarks*Benchmark , used in pricing crude oil-Technology:...

.

The knob is located almost exactly midway between Lexington

Lexington, Kentucky

Lexington is the second-largest city in Kentucky and the 63rd largest in the US. Known as the "Thoroughbred City" and the "Horse Capital of the World", it is located in the heart of Kentucky's Bluegrass region...

 and Louisville

Louisville, Kentucky

Louisville is the largest city in the U.S. state of Kentucky, and the county seat of Jefferson County. Since 2003, the city's borders have been coterminous with those of the county because of a city-county merger. The city's population at the 2010 census was 741,096...

and is the symbolic dividing point between both cities' hinterlands.