Both New Mexico and Texas could be considered to be the approximate halfway point between Nevada and Louisiana. Take a look at the link below for a map showing the drive with directions from New Orleans, Louisiana to Reno, Nevada. Sites like meetways.com allow you to find a halfway point between 2 addresses.
Either Nebraska or Kansas
Amarillo, Texas is midway between Thibodaux LA and las Vegas Nevada
Area 51 in Nevada. Tonopah, Nevada.
Gold Run, CA
The city that is halfway between Virginia and Lexington, KY is Clear Creek, West Virginia. It is the geographical halfway point.
The halfway point between Las Vegas, Nevada and Marcellus, Michigan is Cornell, Nebraska.
Approximately halfway between Henderson, Nevada and New York City is Lincoln, Nebraska.
North pole, ak
Groom, Texas is the halfway point between Northport, Alabama and Las Vegas, Nevada. Please see the related link for Meetways, a site providing halfway point information.
Buster Mountain, Nevada (Approximately 454 miles)
The halfway point between Fernley, NV, and Lebanon, OR, is on US-139 at the Tulelake Municipal Airport in California. The nearest large city is Klamath Falls, OR.