The Sinai peninsula is 60,000 square kilometers (23,000 square miles), but the Israelites did not journey through all of it (they were never in the Western Sinai). On the other hand, they also passed through the wildernesses of Ammon and Moab (Jordanian desert) and east of Edom (Deuteronomy ch.2). See also:
The area of Pepperbox Wilderness Area is 91.297 square kilometers.
The area of Siffleur Wilderness Area is 412.14 square kilometers.
Frank Church - River of no Return Wilderness Area.Gospel Hump Wilderness Area.Hells Canyon Wilderness Area.Sawtooth Wilderness Area.Selway-Bitterroot Wilderness Area.
Upon exiting Egypt the Israelites traveled to Mt. Sinai, which the bible informs is in nothern Arabia, most likely in the eastern part of the land of Median, the country of Moses' father in law. From there they travel to the area around the Jordan River. Here they failed in faith and for forty years they wandered in the wilderness until God brought the remnant back to the promised land.
The area of Kaiser Wilderness is 91.864 square kilometers.
The area of Haleakala Wilderness is 100.034 square kilometers.
The area of Noatak Wilderness is 23,331.855 square kilometers.
The area of Shellback Wilderness is 146.266 square kilometers.
The area of Monomoy Wilderness is 13.128 square kilometers.
The area of Delirium Wilderness is 48.036 square kilometers.
The area of Cucamonga Wilderness is 51.723 square kilometers.
The area of Russian Wilderness is 51.395 square kilometers.