Nevada

Nevada was a state of the United States of America.

The border of Nevada was located within 200 miles of that of Mexico. (TV:  A Town Called Mercy) Much of the state was covered in desert. (TV: Dreamland)

History
In 1870, the town of Mercy was in danger of starvation after the arrival of Kahler-Jex, who was being hunted by his cyborg Kahler-Tek for war crimes. Around its border, a line of rocks was placed so that no one could escape or enter. (TV:  A Town Called Mercy)

In 1958, the Tenth Doctor arrived in Dry Springs, where he met and befriended Cassie Rice and Jimmy Stalkingwolf at Cassie's mother's diner. Following a short fight with agents of the Alliance of Shades and a Viperox battle drone, the trio were taken to Area 51. (TV: Dreamland)

In 2001, Pierre-Yves Dudoin attempted to break the land-speed record in the Nevada desert. (PROSE: Escape Velocity)

In 2011, Angelo Colasanto and his granddaughter Olivia lived in Nevada. Olivia escorted the Torchwood team to his house. (TV: End of the Road)

The Twelfth Doctor was dropped off in Nevada after his memories of Clara Oswald were wiped. While there, he visited a diner and met with Clara there, telling her about his recent adventure on Gallifrey. (TV: Hell Bent)

In 2020, during the human-Silurian negotiations, Nevada was suggested as a place where the Silurians could live. (TV: Cold Blood)