Kittatinny Mountain (Lenape: Kitahtëne[1]) is a long ridge traversing primarily across Sussex County in northwestern New Jersey, running in a northeast-southwest axis, a continuation across the Delaware Water Gap of Pennsylvania's Blue Mountain (also known as Kittatinny Ridge).

The name Kittatinny comes from a Lenape Native American word meaning "endless hill" or "great mountain".

This peak is located in High Point state park and has a road leading to the top.

Around four hundred fifty million years ago, a chain of volcanic islands shaped like an arch collided with proto North America.

The islands went on top of the edge of North America creating the Highlands and the Kittatinny Valley which is the Ordovician Martinsburg Shale.

Quartz and other sedimentary conglomerate was transported to the inland sea, which was over part of the Martinsburg Shale.

A small continent then collided with North America around four hundred million years ago.

Also the intense heat allowed the rock layers to bend, thus the Kittatinny Mountain was born.

Near the base of the west side of the mountain is the Silurian High Falls Formation, which is red and green shale and sandstone.

The east side of the mountain near the base is of the Ordovician Martinsburg Formation which contains slate, shale and sandstone.

Culver's Gap was a route used by Paleo Indians and the Lenape Native Americans to go through the mountain to trade and hunt.

West of the Kittatinny Mountain, at the northwestern end is the Port Jervis trough, also called the Minisink Valley.

The area warmed more around 8000 BC so oak, maple, birch, willow, and other deciduous trees began to grow.

They hunted, fished and gathered plants to eat in the Delaware Valley and on Kittatinny Mountain.

As the glacier melted, grasslands developed which eventually turned into coniferous and later deciduous forests after thousands of years.

The Lenape Native Americans that came to the area two thousand years ago from the Mississippi River valley traveled on the mountain in search of plant foods and game.

This lake is located in High Point State Park which is at the northern end of Kittatinny Mountain.

[2] This mine is located in the Silurian High Falls Formation on the west side of the mountain.

In Pennsylvania, the ridge forming the Kittatinnies becomes known as Blue Mountain and runs southwest for 150 miles (240 km), nearly to Maryland.